Komentaryo sa Exodo 24:4: Rashi, Rashbam, Rabbeinu Bahya & Chizkuni

ויכתב משה AND MOSES WROTE [ALL THE WORDS OF THE LORD] — from בראשית up to (but not including) the account of the Giving of the Torah and he wrote down the commandments that were given to them in Marah (cf. Mekhilta on Exodus 19:10).

FOR THE TWELVE TRIBES OF ISRAEL. As a witness, that all of them were satisfied with the establishment of the covenant.

ויכתב משה את כל דברי ה', “Moses wrote down all the words of the Lord.” This refers to the conditions spelled out in 19,5: “it will be if you listen to My voice, etc.”
וישכם בבוקר ויבן מזבח תחת ההר, “he arose early in the morning and erected an altar beneath the mountain.” This occurred on the fifth day of Sivan.
כל הדברים אשר דבר ה' נעשה, “all the words the Lord has said we shall do.” Rabbeinu Chananel writes that the word נעשה includes the positive and the negative commandments. The reason for this is simple. Anyone who deliberately refrains from violating a negative commandment thereby performs a positive commandment. There is an explicit verse in Psalms 119,3 making precisely this point. The psalmist says: “they have done no wrong but have followed His ways.”

וישכם בבקר AND ROSE UP EARLY IN THE MORNING — on the fifth of Sivan (cf. Rashi on Exodus 19:11) (Shabbat 88a).