The Arabians ... - Probably a band, composed largely of Arabians, Ammonites, and Ashdodites, which Sanballat maintained as a guard to his person, and which formed a portion of "the army of Samaria" Nehemiah 4:2. A quarrel between such a band and the people of Jerusalem might be overlooked by the Persian king.

The walls of Jerusalem were made up - That is, they were made up to the half height of the wall; for the preceding verse seems to intimate that the whole wall was thus far built; not half of the wall completed, but the whole wall built to half its height.

And it came to pass that when Sanballat, and Tobiah, and the Arabians,.... Who were under and influenced by Geshem the Arabian:

and the Ammonites; over whom Tobiah was governor:

and the Ashdodites; who were of Ashdod or Azotus, one of the principalities of the Philistines, who were always enemies to the Jews:

heard that the walls of Jerusalem were made up; or "the length of them went up" (d); that is, the height of them; that they rose up high apace, and were got up to, or almost to their proper height:

and that the breaches began to be stopped; for the walls were not all thrown down by the Chaldeans, but breaches made here and there, which were now repaired:

then they were very wroth; and could not avoid showing it; before they mocked them, as attempting what they could not go through with; but now, perceiving the work went on with great success, they were enraged.

(d) "ascendisset longitudo", Montanus; so Coeceius in rad.

But it came to pass, that when Sanballat, and Tobiah, and the Arabians, and the Ammonites, and the Ashdodites, heard that the walls of Jerusalem were made up, and that the breaches began to be stopped, then they were very wroth,

were made up: Heb. ascended

Ne 4:7-23. He Sets a Watch.

7-21. But . when Sanballat . heard that the walls . were made up, and . the breaches . stopped-The rapid progress of the fortifications, despite all their predictions to the contrary, goaded the Samaritans to frenzy. So they, dreading danger from the growing greatness of the Jews, formed a conspiracy to surprise them, demolish their works, and disperse or intimidate the builders. The plot being discovered, Nehemiah adopted the most energetic measures for ensuring the common safety, as well as the uninterrupted building of the walls. Hitherto the governor, for the sake of despatch, had set all his attendants and guards on the work-now half of them were withdrawn to be constantly in arms. The workmen labored with a trowel in one hand and a sword in the other; and as, in so large a circuit, they were far removed from each other, Nehemiah (who was night and day on the spot, and, by his pious exhortations and example, animated the minds of his people) kept a trumpeter by his side, so that, on any intelligence of a surprise being brought to him, an alarm might be immediately sounded, and assistance rendered to the most distant detachment of their brethren. By these vigilant precautions, the counsels of the enemy were defeated, and the work was carried on apace. God, when He has important public work to do, never fails to raise up instruments for accomplishing it, and in the person of Nehemiah, who, to great natural acuteness and energy added fervent piety and heroic devotion, He provided a leader, whose high qualities fitted him for the demands of the crisis. Nehemiah's vigilance anticipated every difficulty, his prudent measures defeated every obstruction, and with astonishing rapidity this Jerusalem was made again "a city fortified."

4:7-15 The hindering good work is what bad men aim at, and promise themselves success in; but good work is God's work, and it shall prosper. God has many ways of bringing to light, and so of bringing to nought, the devices and designs of his church's enemies. If our enemies cannot frighten us from duty, or deceive us into sin, they cannot hurt us. Nehemiah put himself and his cause under the Divine protection. It was the way of this good man, and should be our way. All his cares, all his griefs, all his fears, he spread before God. Before he used any means, he made his prayer to God. Having prayed, he set a watch against the enemy. If we think to secure ourselves by prayer, without watchfulness, we are slothful, and tempt God; if by watchfulness, without prayer, we are proud, and slight God: either way, we forfeit his protection. God's care of our safety, should engage and encourage us to go on with vigour in our duty. As soon as a danger is over, let us return to our work, and trust God another time.