The horse was not anciently used in the East for purposes of agriculture or traveling, but ordinarily for war only. He appears constantly in Scripture as the symbol and embodiment of fleshly strength and the might of the creature (compare Psalm 20:7; Psalm 33:16-17; Psalm 147:10; Job 39:19 ff), and is sometimes significantly spoken of simply as "the strong one" (compare Jeremiah 8:16). The spirit of the prohibition therefore is that the king of Israel must not, like other earthly potentates, put his trust in costly and formidable preparations for war (compare Hosea 1:7).

Egypt was the principal source from where the nations of western Asia drew their supplies of this animal (compare Exodus 14:5 ff; 1 Kings 10:28-29; 2 Kings 7:6); but contact, traffic, or alliance which would "cause the people to return to Egypt" would be to reverse that great and beneficent wonderwork of God which inaugurated the Mosaic covenant, the deliverance from the bondage of Egypt; and to bring about of set purpose that which God threatened Deuteronomy 28:68 as the most severe punishment for Israel's sin.

He shall not multiply horses - As horses appear to have been generally furnished by Egypt, God prohibits these,

1. Lest there should be such commerce with Egypt as might lead to idolatry.

2. Lest the people might depend on a well-appointed cavalry as a means of security, and so cease from trusting in the strength and protection of God. And,

3. That they might not be tempted to extend their dominion by means of cavalry, and so get scattered among the surrounding idolatrous nations, and thus cease, in process of time, to be that distinct and separate people which God intended they should be, and without which the prophecies relative to the Messiah could not be known to have their due and full accomplishment.

But he shall not multiply horses to himself,.... That he might not put his trust and confidence in outward things, as some are apt to trust in horses and chariots; and that he might not tyrannise over and distress his subjects by keeping a number of horses and chariots as a standing army, and chiefly for a reason that follows; he was to have no more than for his own chariot, so Jarchi, and so the Misnah (g) and Maimonides (h); the Targum of Jonathan restrains it to two:

nor cause the people to return to Egypt, to the end that he should multiply horses; which was a country that abounded with them, and therefore he was not to encourage, and much less oblige his subjects to travel thither or trade with that people for the sake of increasing his stock of horses, Isaiah 31:1.

forasmuch as the Lord hath said unto you, ye shall henceforth return no more that way; not that going into Egypt on any account whatsoever was forbidden, as for trade and merchandise in other things, or for shelter and safety, for which some good men fled thither; but for outward help and assistance against enemies, and for horses on that account, and particularly in order to dwell there, from which the Jews in the times of Jeremiah were dissuaded by him, and threatened by the Lord with destruction, in case they should, Jeremiah 42:15. When the Lord said this is not certain; it may be when they proposed to make a captain, and return unto Egypt; or he said this in his providence, this was the language of it ever since they came out of it, or however this he now said; see Deuteronomy 28:68.

(g) Sanhedrin, c. 2. sect. 4. (h) Hilchot Melachim, c. 3. sect. 3.

But he shall not multiply horses to himself, nor cause the people to return to {k} Egypt, to the end that he should multiply horses: forasmuch as the LORD hath said unto you, Ye shall henceforth return no more that way.

(k) To avenge their injuries and to take their best horses from them; 1Ki 10:28.

17:16 He shall not multiply horses - Tho' he might have horses for his own use, yet he was not to have many horses for his officers and guard, much less for war, lest he should trust in them. The multiplying horses is also forbidden, lest it should raise too great a correspondence with Egypt which furnished Canaan with them. The Lord hath said - The Lord hath now said to me, and I by his command declare it to you. Ye shall no more return that way - Into Egypt, lest ye be again infected with her idolatries.

16. he shall not multiply horses to himself-The use of these animals was not absolutely prohibited, nor is there any reason to conclude that they might not be employed as part of the state equipage. But the multiplication of horses would inevitably lead to many evils, to increased intercourse with foreign nations, especially with Egypt, to the importation of an animal to which the character of the country was not suited, to the establishment of an Oriental military despotism, to proud and pompous parade in peace, to a dependence upon Egypt in time of war, and a consequent withdrawal of trust and confidence in God. (2Sa 8:4; 1Ki 10:26; 2Ch 1:16; 9:28; Isa 31:3).

17:14-20 God himself was in a particular manner Israel's King; and if they set another over them, it was necessary that he should choose the person. Accordingly, when the people desired a king, they applied to Samuel, a prophet of the Lord. In all cases, God's choice, if we can but know it, should direct, determine, and overrule ours. Laws are given for the prince that should be elected. He must carefully avoid every thing that would turn him from God and religion. Riches, honours, and pleasures, are three great hinderances of godliness, (the lusts of the flesh, the lusts of the eye, and the pride of life,) especially to those in high stations; against these the king is here warned. The king must carefully study the law of God, and make that his rule; and having a copy of the Scriptures of his own writing, must read therein all the days of his life. It is not enough to have Bibles, but we must use them, use them daily, as long as we live. Christ's scholars never learn above their Bibles, but will have constant occasion for them, till they come to that world where knowledge and love will be made perfect. The king's writing and reading were as nothing, if he did not practise what he wrote and read. And those who fear God and keep his commandments, will fare the better for it even in this world.