Mark 12:19

“Teacher, Moses wrote for us [a law] that if a man’s brother dies and leaves a wife but leaves no child, his brother is to marry the widow and raise up children for his brother.

Genesis 38:8

Then Judah told Onan, “Go in to your brother’s widow, and perform your duty as a brother-in-law [under the levirate marriage custom]; [be her husband and] raise children for [the name of] your brother.”

Deuteronomy 25:5-10

“If brothers are living together and one of them dies without a son, the widow of the deceased shall not be married outside the family to a stranger. Her husband’s brother shall be intimate with her after taking her as his wife and perform the duty of a husband’s brother to her.

Ruth 1:11-13

But Naomi said, “Go back, my daughters, why should you go with me? Do I still have sons in my womb that may become your husbands?

Ruth 4:5

Then Boaz said, “The day that you buy the field from Naomi, you must also acquire Ruth the Moabitess, the widow of the deceased, to restore the name of the deceased to his inheritance.”

Treasury of Scripture Knowledge

Summary

Master, Moses wrote unto us, If a man's brother die, and leave his wife behind him, and leave no children, that his brother should take his wife, and raise up seed unto his brother.

That

Bible References

If

Genesis 38:8
Then Judah told Onan, “Go in to your brother’s widow, and perform your duty as a brother-in-law [under the levirate marriage custom]; [be her husband and] raise children for [the name of] your brother.”
Deuteronomy 25:5
“If brothers are living together and one of them dies without a son, the widow of the deceased shall not be married outside the family to a stranger. Her husband’s brother shall be intimate with her after taking her as his wife and perform the duty of a husband’s brother to her.
Ruth 4:5
Then Boaz said, “The day that you buy the field from Naomi, you must also acquire Ruth the Moabitess, the widow of the deceased, to restore the name of the deceased to his inheritance.”

That

Ruth 1:11
But Naomi said, “Go back, my daughters, why should you go with me? Do I still have sons in my womb that may become your husbands?

General references

Leviticus 18:16
You shall not uncover the nakedness of your brother’s wife; it is your brother’s nakedness.
Matthew 22:25
Now there were seven brothers among us; the first married and died, and having no children left his wife to his brother.
Luke 20:33
So in the [life after] resurrection, whose wife does she become? For all seven had married her.”