11 And our enemies said, "They will not know or see till we come into the midst of them and kill them and stop the work." 12 When the Jews who lived by them came they said to us ten times, "From all the places where they live they will come up against us." 13 So in the lowest parts of the space behind the wall, in open places, I stationed the people according to their families, with their swords, their spears, and their bows. 14 And I looked, and arose, and said to the nobles and to the officials and to the rest of the people, "Do not be afraid of them. Remember the Lord, who is great and terrible, and fight for your brethren, your sons, your daughters, your wives, and your homes." 15 When our enemies heard that it was known to us and that God had frustrated their plan, we all returned to the wall, each to his work.

16 From that day on, half of my servants worked on construction, and half held the spears, shields, bows, and coats of mail; and the leaders stood behind all the house of Judah, 17 who were building on the wall. Those who carried burdens were laden in such a way that each with one hand labored on the work and with the other held his weapon. 18 And each of the builders had his sword girded at his side while he built. The man who sounded the trumpet was beside me.

Matthew Henry's Commentary on Nehemiah 4:11-18

Commentary on Nehemiah 4:7-15

(Read Nehemiah 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.

Commentary on Nehemiah 4:16-23

(Read Nehemiah 4:16-23)

We must watch always against spiritual enemies, and not expect that our warfare will be over till our work is ended. The word of God is the sword of the Spirit, which we ought to have always at hand, and never to have to seek for it, either in our labours, or in our conflicts, as Christians. Every true Christian is both a labourer and a soldier, working with one hand, and fighting with the other. Good work is likely to go on with success, when those who labour in it, make a business of it. And Satan fears to assault the watchful Christian; or, if attacked, the Lord fights for him. Thus must we wait to the close of life, never putting off our armour till our work and warfare are ended; then we shall be welcomed to the rest and joy of our Lord.