Matthew 5:31

It has also been said, ‘Whoever divorces his wife must give her a certificate of divorce.’

Note Deuteronomy 24:1

BSB · Berean Standard Bible
It hath been said, Whosoever shall put away his wife, let him give her a writing of divorcement:
KJV · King James Version
“It was also said, ‘Whoever shall put away his wife, let him give her a writing of divorce,’
WEB · World English Bible
It was said also, Whosoever shall put away his wife, let him give her a writing of divorcement:
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

whosoever
Matthew 19:3, 7; Deuteronomy 24:1–4; Jeremiah 3:1; Mark 10:2–9