Rashi on Exodus 31:18/רש"י על שמות ל״א:י״ח

1ויתן אל משה וגו׳ AND HE GAVE UNTO MOSES etc. — There is no “earlier” or “later” (no chronological order) in the events related in the Torah: in fact the incident of the golden calf (related in ch. 32) happened a considerable time before the command regarding the work of the Tabernacle was given (ch. 25 and the following chapters). For on the seventeenth of Tammuz were the Tablets broken (when the people were worshipping the calf) and on the Day of Atonement God became reconciled with Israel (after Moses had prayed 80 days for forgivenness; so that it is very unlikely that the command for the building of the Tabernacle should have been given before that day) and on the next day, the eleventh of Tishri (cf. Rashi on Exodus 33:11, at end of comment on ושב אל המחנה), they began to bring their contributions for the Tabernacle which was set up on the first of Nisan. (From the seventeenth of Tammuz until the eleventh of Tishri are almost three months — ימים רבים) (Midrash Tanchuma, Ki Tisa 31).

2ככלתו WHEN HE FINISHED [SPEAKING] — The word ככלתו is written defectively (without a ו after the ל) to intimate that the Torah was handed over to Moses as a gift (note the word ויתן), complete in every respect, even as the bride (the word ככלתו is taken to be connected with “כלה”, bride) is handed over to the bridegroom completely equipped with all she requires — for in a period brief as this which Moses spent on the mountain, he must have been unable to learn in its entirety every law to be derived from it. Another explanation why the word is written defective is: just as a bride (כלה) bedecks herself with 24 ornaments — those which are mentioned in the book of Isaiah (ch. 3) — so a scholar (תלמיד חכם) ought to be thoroughly versed in the contents of the 24 books of Scripture (Midrash Tanchuma, Ki Tisa 16).

3לדבר אתו TO SPEAK WITH HIM the statutes and the judgments contained in the section beginning with ואלה המשפטים (ch. Exodus 21 ff.).

4לדבר אתו TO SPEAK “WITH” HIM — The use of the word אתו “with him” teaches us that Moses first heard the laws from the mouth of the Almighty and that then they both again repeated each Halacha together (Exodus Rabbah 41:5).

5לחת TABLETS — The word is written defectively לחת (without a ו between ח and ת), thus intimating that they were both alike in every respect (Exodus Rabbah 41:6).