The sons of Aaron - As the trumpets were emblematic of the voice of God, the priests only were to use them. At this time there were only two "sons of Aaron;" but in later times, when the number of priests was greater, more trumpets were used; we read of seven in the times of Joshua and David (see the marginal references.); and of a hundred and twenty in that of Solomon 2 Chronicles 5:12.

And the sons of Aaron the priests shall blow with the trumpets,.... Eleazar and Ithamar, the one with the one and the other with the other, there being at first but two, as there were but two priests; but in Solomon's time there were an hundred twenty priests, and as many trumpets, 2 Chronicles 5:12; hence Maimonides says (l), there were never fewer than two trumpets, nor more than an hundred twenty:

and they shall be to you for an ordinance for ever throughout your generations: for they were not only for present use, for the journeying of the camps in the wilderness, but for calling together the assembly in later times, as well as for other uses next mentioned; which would obtain in future ages till the coming of Christ, and even under the Gospel dispensation the mystical use of them continues, the preaching of the everlasting Gospel.

(l) Hilchot Cele Hamikdash, c. 3. sect. 4.

These trumpets were to be used for the holy purposes of the congregation generally, and therefore not only the making, but the manner of using them was prescribed by God Himself. They were to be blown by the priests alone, and "to be for an eternal ordinance to the families of Israel," i.e., to be preserved and used by them in all future times, according to the appointment of God. The blast of these trumpets was to call Israel to remembrance before Jehovah in time of war and on their feast-days.

And the sons of Aaron, the priests, shall {d} blow with the trumpets; and they shall be to you for an ordinance for ever throughout your generations.

(d) So that only the priests must blow the trumpets, as long as the priesthood lasted.

8. the sons of Aaron the priests shall blow with the trumpets, &c.-Neither the Levites nor any in the common ranks of the people could be employed in this office of signal giving. In order to attract greater attention and more faithful observance, it was reserved to the priests alone, as the Lord's ministers; and as anciently in Persia and other Eastern countries the alarm trumpets were sounded from the tent of the sovereign, so were they blown from the tabernacle, the visible residence of Israel's King.

10:1-10 Here are directions concerning the public notices to be given the people by sound of trumpet. Their laws in every case were to be Divine, therefore, even in this matter Moses is directed. These trumpets typify the preached gospel. It sounds an alarm to sinners, calls them to repent, proclaims liberty to the captives and slaves of Satan, and collects the worshippers of God. It directs and encourages their heavenly journey; stirs them up to combat against the world and sin, encouraging them with the assurance of victory. It leads their attention to the sacrifice of Christ, and shows the Lord's presence for their protection. It is also necessary that the gospel trumpet give a distinct sound, according to the persons addressed, or the end proposed; whether to convince, humble, console, exhort, reprove, or teach. The sounding of the trumpet of the gospel is God's ordinance, and demands the attention of all to whom it is sent.