Matthew 24:39 "and they did not know (were not aware; took no note of the situation) until the down-wash (deluge; flood; cataclysm) came and washed the whole population away (or: picked up all the people to sweep them away) – thus (in this same way) will progressively be the presence of the Son of the Man!

JMNT⁽ⁱ⁾ ³⁹ "and they did not know (were not aware; took no note of the situation) until the down-wash (deluge; flood; cataclysm) came and washed [the] whole population away (or: picked up all [the] people to sweep [them] away) – thus (in this same way) will progressively be the presence of the Son of the Man!