פירוש על שמות 34:29

ויהי ברדת משה AND IT CAME TO PASS WHEN MOSES WENT DOWN [FROM MOUNT SINAI] — when he brought the second tablets on the Day of Atonement.

ויהי ברדת משה, "It occurred while Moses descended," The Torah uses the word ויהי which portends something painful because all the righteous people in the camp of the Israelites were "burned" when they observed that Moses' face emitted rays of light.

כי קרן, an expression denoting majesty. The word occurs in this sense also in Chabakuk 3,4 קרנים מידו לו, “which gives off rays from every side.” Anyone who compares the meaning of the words קרן עור פניו in Deuteronomy 33,17 וקרני ראם לו, “having horns like the reem,” .is completely foolish. It is quite normal for words in the Torah to have more than one meaning, depending on the context in which they are used.