Widows: Laws Respecting: when Left Childless, to be Married by Their Husband's
Source: TTT
Deuteronomy 25:5, 6
When brothers dwell together and one of them dies without a son, the widow must not marry outside the family. Her husband’s brother is to take her as his wife and fulfill the duty of a brother-in-law for her. / The first son she bears will carry on the name of the dead brother, so that his name will not be blotted out from Israel.
Ruth 3:10–13
Then Boaz said, “May the LORD bless you, my daughter. You have shown more kindness now than before, because you have not run after the younger men, whether rich or poor. / And now do not be afraid, my daughter. I will do for you whatever you request, since all my fellow townspeople know that you are a woman of noble character. / Yes, it is true that I am a kinsman-redeemer, but there is a redeemer nearer than I.
Ruth 4:4, 5
I thought I should inform you that you may buy it back in the presence of those seated here and in the presence of the elders of my people. If you want to redeem it, do so. But if you will not redeem it, tell me so I may know, because there is no one but you to redeem it, and I am next after you.” “I will redeem it,” he replied. / Then Boaz said, “On the day you buy the land from Naomi and also from Ruth the Moabitess, you must also acquire the widow of the deceased in order to raise up the name of the deceased on his inheritance.”
Matthew 22:24–26
“Teacher,” they said, “Moses declared that if a man dies without having children, his brother is to marry the widow and raise up offspring for him. / Now there were seven brothers among us. The first one married and died without having children. So he left his wife to his brother. / The same thing happened to the second and third brothers, down to the seventh.