After the plague - These words serve to show approximately the date at which the census was taken, and intimate the reason for the great decrease in numbers which was found to have taken place in certain tribes. Compare Deuteronomy 4:3 and Numbers 26:5 note in this chapter.
Related Commentaries of Numbers 26:1
Numbers 26:1
1 And it came to pass after the plague, that the LORD spake unto Moses and unto Eleazar the son of Aaron the priest, saying,