2. this month shall be unto you the beginning of months—the first not only in order but in estimation. It had formerly been the seventh according to the reckoning of the civil year, which began in September, and continued unchanged, but it was thenceforth to stand first in the national religious year which began in March, April.

     4. month Abib—literally, "a green ear," and hence the month Abib is the month of green ears, corresponding to the middle of our March. It was the best season for undertaking a journey to the desert region of Sinai, especially with flocks and herds; for then the winter torrents had subsided, and the wadies were covered with an early and luxuriant verdure.

     1. In the third month—according to Jewish usage, the first day of that month—"same day."—It is added, to mark the time more explicitly, that is, forty-five days after Egypt—one day spent on the mount (Ex 19:3), one returning the people's answer (Ex 19:7, 8), three days of preparation, making the whole time fifty days from the first passover to the promulgation of the law. Hence the feast of pentecost, that is, the fiftieth day, was the inauguration of the Old Testament church, and the divine wisdom is apparent in the selection of the same reason for the institution of the New Testament church (Joh 1:17; Ac 2:1).

     18-21. all the people saw the thunderings and the lightnings—They were eye and ear witnesses of the awful emblems of the Deity's descent. But they perceived not the Deity Himself.

     28. he was there with the Lord forty days and forty nights—as long as formerly [Ex 24:18], being sustained for the execution of his special duties by the miraculous power of God. A special cause is assigned for his protracted fast on this second occasion (De 9:18).