Matthew
Matthew 24:39BSB·traditional attribution

And they were oblivious until the flood came and swept them all away. So will it be at the coming of the Son of Man.

John Calvin Reformed @genevareformer

39. And knew not until the deluge came. The source and cause of their ignorance was, that unbelief had blinded their minds; as, on the other hand, we are informed by the Apostle, that Noah beheld at a distance, by the eyes of faith, the vengeance of God which was still concealed, so as to entertain an early dread of it, (Hebrews 11:7.) And here...

John Gill Reformed Baptist @doctorgill

Then shall two be in the field,.... About their proper business, of husbandry, ploughing, or sowing, or any other rural employment: the one shall be taken; not by the preaching of the Gospel, into the kingdom of God, or Gospel dispensation; though such a distinction God makes, by the ministry of the word, accompanied by his Spirit and power; nor by angels, to meet Christ...

Albert Barnes Presbyterian @notesbybarnes

Verse 39. And knew not. That is, they knew not the exact time, until it came upon them. So, says he, it shall be when the Son of man shah come. They shall not know the precise time until he comes, and then they shall be found engaged in the ordinary business of life unconcerned.