No weapon. See on v. 16. God will care for His own and vindicate them before their enemies. Neither evil men nor demons can prevail against them (see Isa. 50:8, 9; Zech. 3:1,2).
Servants of the Lord. That is, the people of Israel (see on ch. 41:8).
Their righteousness. More exactly, “their vindication.” God will vindicate the cause of His servants. When the enemy accuses them and fights against them He will pronounce them innocent and deliver them.
When confronted with forbidding circumstances in which it appears that suffering and injury at the hands of scheming men are about to be experienced, it is the privilege of the faithful Christian to say with the psalmist, “The Lord is on my side; I will not fear: what can man do unto me?” (Ps. 118:6).