“Nevertheless we made our prayer unto our God, and set a watch against them day and night, because of them.”- Nehemiah 4:9

Nehemiah, and the Jews with him, were rebuilding the walls of Jerusalem. Sanballat and others were angry with them, and tried to stop the work. They determined to pounce upon the people on a sudden, and slay them, and so to put an end to what they were doing. Our text tells us what Nehemiah and his companions did in this emergency: “Nevertheless we made our prayer unto our God, and set a watch against them day and night, because of them.” These people had not only to build the wall of Jerusalem, but to watch against their enemies at the same time. Their case is ours. We have to work for Christ. I hope that all of us who love Him are trying to do what we can to build up His kingdom; but we need also to watch against deadly foes. If they can destroy us, of course they will also destroy our work. They will do both, if they can. The powers of evil are mad against the people of God. If they can, in any way, injure or annoy us, you may rest assured that they will do so. They will leave no stone unturned, if it can serve their purpose. No arrows will be left in the quivers of hell while there are godly men and women at whom they can be aimed. Satan and his allies aim at our hearts every poisoned dart they have.

As our Lord said to Peter, “Simon, Simon, Satan hath desired to have you, that he may sift you as wheat,” so has He, in His word, told us that there is a great and terrible evil power which is seeking our destruction. If Satan can do it, he will not only sift us as wheat, but he will cast us into the fire that we may be destroyed. Brethren, “we are not ignorant of his devices.” You are not left in a fool’s paradise, to dream of security from trial, and to fancy that you are past temptation. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2254.cfm