Quotation על שמות 34:4

ומשה עלה AND MOSES WENT UP on the second day of the month (Mekhilta d'Rabbi Yishmael 19:3); for all his ascents to the mountain were made early in the morning, as it is stated (Exodus 34:4) “And Moses rose up early in the morning [and went up unto mount Sinai]” (Shabbat 86b).