Exodus 38:17

38:17 The bases for the posts were bronze. The hooks of the posts and their bands were silver, their tops were overlaid with silver, and all the posts of the courtyard had silver bands.

Exodus 17:2

17:2 So the people contended with Moses, and they said, “Give us water to drink!” Moses said to them, “Why do you contend with me? Why do you test the Lord?”