TSK
Treasury of Scripture Knowledge references in WEB.
Onan knew that the seed wouldn't be his; and it happened, when he went in to his brother's wife, that he spilled it on the ground, lest he should give seed to his brother.
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."
saying, "Teacher, Moses said, 'If a man dies, having no children, his brother shall marry his wife, and raise up seed for his brother.'
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.