Deuteronomy 25:5

If brothers dwell together, and one of them die, and have no son, the wife of the dead shall not be married outside to a stranger: her husband's brother shall go in to her, and take her to him as wife, and perform the duty of a husband's brother to her.

Matthew 22:24

saying, "Teacher, Moses said, 'If a man dies, having no children, his brother shall marry his wife, and raise up seed for his brother.'

Mark 12:19

"Teacher, Moses wrote to us, 'If a man's brother dies, and leaves a wife behind him, and leaves no children, that his brother should take his wife, and raise up offspring for his brother.'

Luke 20:28

They asked him, "Teacher, Moses wrote to us that if a man's brother dies having a wife, and he is childless, his brother should take the wife, and raise up children for his brother.

Genesis 38:8-9

Judah said to Onan, "Go in to your brother's wife, and perform the duty of a husband's brother to her, and raise up seed to your brother."

Ruth 1:12-13

Go back, my daughters, go your way; for I am too old to have a husband. If I should say, 'I have hope,' if I should even have a husband tonight, and should also bear sons;

Ruth 3:9

He said, "Who are you?" She answered, "I am Ruth your handmaid. Therefore spread your skirt over your handmaid; for you are a near kinsman."

Ruth 4:5

Then Boaz said, "On the day you buy the field from the hand of Naomi, you must buy it also from Ruth the Moabitess, the wife of the dead, to raise up the name of the dead on his inheritance."

Treasury of Scripture Knowledge

Summary

If brethren dwell together, and one of them die, and have no child, the wife of the dead shall not marry without unto a stranger: her husband's brother shall go in unto her, and take her to him to wife, and perform the duty of an husband's brother unto her.

Bible References

Brethren

Matthew 22:24
saying, "Teacher, Moses said, 'If a man dies, having no children, his brother shall marry his wife, and raise up seed for his brother.'
Mark 12:19
"Teacher, Moses wrote to us, 'If a man's brother dies, and leaves a wife behind him, and leaves no children, that his brother should take his wife, and raise up offspring for his brother.'
Luke 20:28
They asked him, "Teacher, Moses wrote to us that if a man's brother dies having a wife, and he is childless, his brother should take the wife, and raise up children for his brother.

Husband's brother

Genesis 38:8
Judah said to Onan, "Go in to your brother's wife, and perform the duty of a husband's brother to her, and raise up seed to your brother."
Ruth 1:12
Go back, my daughters, go your way; for I am too old to have a husband. If I should say, 'I have hope,' if I should even have a husband tonight, and should also bear sons;
Ruth 3:9
He said, "Who are you?" She answered, "I am Ruth your handmaid. Therefore spread your skirt over your handmaid; for you are a near kinsman."
Ruth 4:5
Then Boaz said, "On the day you buy the field from the hand of Naomi, you must buy it also from Ruth the Moabitess, the wife of the dead, to raise up the name of the dead on his inheritance."

General references

Genesis 38:8
Judah said to Onan, "Go in to your brother's wife, and perform the duty of a husband's brother to her, and raise up seed to your brother."
Leviticus 18:16
"'You shall not uncover the nakedness of your brother's wife: it is your brother's nakedness.
Matthew 14:4
For John said to him, "It is not lawful for you to have her."
Luke 20:28
They asked him, "Teacher, Moses wrote to us that if a man's brother dies having a wife, and he is childless, his brother should take the wife, and raise up children for his brother.