Deuteronomy 25:5

If brethren dwell together, and one of them dies, and has no child, the wife of the dead shall not marry outside unto a stranger: her husband's brother shall go in unto her, and take her to him as wife, and perform the duty of a husband's brother unto her.

Matthew 22:24

Saying, Teacher, Moses said, If a man die, having no children, his brother shall marry his wife, and raise up children unto his brother.

Mark 12:19

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

Luke 20:28

Saying, Teacher, Moses wrote unto us, If any man's brother dies, having a wife, and he dies without children, that his brother should take his wife, and raise up children for his brother.

Genesis 38:8-9

And Judah said unto Onan, Go in unto your brother's wife, and marry her, and raise up descendants to your brother.

Ruth 1:12-13

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

Ruth 3:9

And he said, Who are you? And she answered, I am Ruth your handmaid: spread therefore your skirt over your handmaid; for you are a near kinsman.

Ruth 4:5

Then said Boaz, The day you buy the field of 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 through 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 die, having no children, his brother shall marry his wife, and raise up children unto his brother.
Mark 12:19
Teacher, Moses wrote unto us, If a man's brother dies, and leaves his wife behind him, and leaves no children, that his brother should take his wife, and raise up children unto his brother.
Luke 20:28
Saying, Teacher, Moses wrote unto us, If any man's brother dies, having a wife, and he dies without children, that his brother should take his wife, and raise up children for his brother.

Husband's brother

Genesis 38:8
And Judah said unto Onan, Go in unto your brother's wife, and marry her, and raise up descendants to your brother.
Ruth 1:12
Turn again, my daughters, go your way; for I am too old to have a husband. If I should say, I have hope, if I should have a husband also tonight, and should also bear sons;
Ruth 3:9
And he said, Who are you? And she answered, I am Ruth your handmaid: spread therefore your skirt over your handmaid; for you are a near kinsman.
Ruth 4:5
Then said Boaz, The day you buy the field of 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 through his inheritance.

General references

Genesis 38:8
And Judah said unto Onan, Go in unto your brother's wife, and marry her, and raise up descendants 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 unto him, It is not lawful for you to have her.
Luke 20:28
Saying, Teacher, Moses wrote unto us, If any man's brother dies, having a wife, and he dies without children, that his brother should take his wife, and raise up children for his brother.