Exodus 2v11-12

Heavenly Father
Give us grace today to refrain from overcoming evil with evil

11 In those days, when Moses had grown up, he went out to his brothers and saw their burdens. 
He saw an Egyptian striking a Hebrew, one of his brothers. 
12 He looked this way and that way, and when he saw that there was no one, he killed the Egyptian, and hid him in the sand.