Luke 20:28
Saying, Master, Moses wrote unto us, If any man’s brother die, having a wife, and he die without children, that his brother should take his wife, and raise up seed unto his brother.
Cross-references
Genesis 38:8 records Judah's command to Onan to marry his brother's widow — the first instance of the levirate law Jesus references.
Deuteronomy 25:5-10 is the Mosaic law of levirate marriage that Jesus is citing in the Sadducees' scenario.
Ruth 4:5 shows Boaz fulfilling the levirate duty to raise up offspring for the dead, directly exemplifying the law Jesus cites.
Matthew 22:24 is the Synoptic parallel where the Sadducees ask Jesus the same question, quoting the same levirate law.
Genesis 38:11 continues the levirate story with Judah telling Tamar to wait — part of the same narrative behind the law Jesus mentions.
Ruth 1:11 mentions the levirate custom when Naomi says she has no more sons — a later example of the same law Jesus references.
In Ruth 1:12, Naomi's reasoning about being too old to bear sons illustrates the levirate practice Jesus references — a narrative example of the same custom.