Deuteronomy 10:4

10:4 The Lord then wrote on the tablets the same words, the ten commandments, which he had spoken to you at the mountain from the middle of the fire at the time of that assembly, and he gave them to me.

Deuteronomy 18:22

18:22 whenever a prophet speaks in my name and the prediction is not fulfilled, then I have not spoken it; the prophet has presumed to speak it, so you need not fear him.”