Matthew Poole and continuators on Exodus 12:41

41 And it came to pass at the end of the four hundred and thirty years , even the self-same day it came to pass, that all the hosts of the LORD went out from the land of Egypt.

If this be the right translation, the 430 years mentioned Gal. 3. 17. are to be taken in a latitude, for about or near so many years, as is very frequent in Scripture and other Authours, else there wants one year of it, because the law was not given till about a year after their coming out of Egypt. Nor was it of any concernment to the Apostles argument there whether it wanted a year of that number or no, as here it is. But the words may be rendred here, as Gen. 7. 12. in the body or strength of the day, i. e. when the day-light was full and clear and strong, when it was broad day-light, the Egyptians seeing, and not being able to hinder them. If it be said, they went out by night, Deut. 16. 1. that is true, in regard of their resolution and preparation and the beginning of their journey, but their actual marching forth was by day-light or in the morning, nor could it be done sooner from the nature of the thing and the time necessarily required for so great a work.

This circumstance is noted to set forth the accurateness and infallibility of Gods foreknowledge and the efficacy of his providence in accomplishing all his own counsels in his own appointed time.