Esodo 35:1

And Moses gathered all the congregation of the children of Israel together, and said unto them, These [are] the words which the LORD hath commanded, that [ye] should do them.

Ver. 1. And said unto them, These, &c,] He often goes over the same things, as the knife doth the whetstone. Good things must be repeated, sicut in acuendo. It is Moses's own metaphor. Deu 6:7