TSK · Ruth 4:5

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."

Now it is true that I am a near kinsman; however there is a kinsman nearer than I.

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