Exo. 17:12-13—But Moses’ hands were heavy, so they took a stone and put it under him, and he sat on it; and Aaron and Hur supported his hands, one on one side and one on the other side. So his hands were steady until the going down of the sun. And Joshua defeated Amalek and his people with the edge of the sword.
Phil. 2:12-13—So then, my beloved, even as you have always obeyed, not as in my presence only but now much rather in my absence, work out your own salvation with fear and trembling; for it is God who operates in you both the willing and the working for His good pleasure.
For further reading please refer to 出埃及記生命讀經，, msg. 48, pp. 558-559.