Exodus 34:27-29

Complete Jewish Bible

(vii) ²⁷ Adonai said to Moshe, “Write these words down, because they are the terms of the covenant I have made with you and with Isra’el.” ²⁸ Moshe was there with Adonai forty days and forty nights, during which time he neither ate food nor drank water. [Adonai] wrote on the tablets the words of the covenant, the Ten Words.

²⁹ When Moshe came down from Mount Sinai with the two tablets of the testimony in his hand, he didn’t realize that the skin of his face was sending out rays of light as a result of his talking with [Adonai].