Ver. 12. "And the rain was upon the earth forty days and forty nights."
That is, It rained so long without stop or sting (v 4).
Ver. 13. "In the self same day entered Noah, and Shem, and Ham, and Japheth, the sons of Noah, and Noah's wife, and the three wives of his sons with them, into the ark."
This therefore more fully approveth of what I said before; to wit, That they had hardly done their work in the world, by that it began to rain; but so soon as they had done, the flood was upon the earth. Much like this is that of Lot; it was not to rain fire and brimstone upon Sodom, till he was got to Zoar: But when Lot was entered, but just entered, "Then the Lord rained upon Sodom, and upon Gomorrah, brimstone and fire from the LORD out of heaven" (Gen 19:21-24).
Hence note, That the reason why God doth forbear to destroy the world for the wickedness of them that dwell therein, it is for the sake of the elect; because his work upon them is not fully perfected. "The Lord is not slack concerning his promise" (2 Peter 3:9); no, nor as concerning his threatening neither,—but is long-suffering to us-ward who are the elect; not willing that any of us should perish: But when Christ, head and members, are complete in all things, let the world look for patience and forbearance no longer; for in that self same day the trump of God will sound, and the Lord descend with a shout from heaven, to execute his anger with fury, and his rebukes with flames of fire. Behold, he is now "ready to judge the quick and the dead!" (1 Peter 4:5) "ready to be revealed in the last time!" (1 Peter 1:5). The judge also stands at the door (James 5:9); it is but opening therefore, and his hand is upon you, which most assuredly he will do when his body is full and complete.
Observe again, that providence sometimes so ordereth it, that as touching the command of the Lord, necessity is as it were the great wheel that brings men into the performances of them, as here the flood drove them into the ark; as he said above, they went in because of the waters of the flood: So concerning the ordinance of unleavened bread, the first institution of that law, was as it were accompanied with an unavoidable necessity, it was unleavened, saith the text, "because they were thrust out of Egypt, and could not tarry, neither had they prepared for themselves any victual" (Exo 12:39).
It will be thus also at the day of judgment: Israel will be sufficiently wary of this world, they will even as it were unexpressibly groan to be taken up from hence; wherefore the Lord will come, as making use of the weariness and groaning of his people, and will take them up into his chambers of rest, and will wipe away all tears from their eyes, as here Noah and his sons, &c. did enter into the ark.
Ver. 14. "They, and every beast after his kind, and all the cattle after their kind, and every creeping thing that creepeth upon the earth after his kind, and every fowl after his kind, every bird of every sort" or wing.
Without doubt this careful repetition is not without a cause, and have also in the bowels of it some comfortable doctrine for the church of God; every beast, all cattle, every creeping thing that creepeth; every fowl and bird of every wing.
Fist this sheweth, that God hath respect to the fulfilling of his word in the midst of all his zeal and anger against sin (Gen 19). He doth not as we, being angry, run headlong upon the offenders, but if there be but three in a kingdom, or one in four cities, he will have respect to them (Eze 14:19,20).