"Teacher, Moses wrote to us that if a man's brother dies, and leaves his wife behind, and leaves no children, his brother should take his wife and raise up offspring for his brother.
Mark 12:19
Surrounding context
12:18 Then some Sadducees, who say there is no resurrection, came to Him; and they asked Him, saying:
12:19 "Teacher, Moses wrote to us that if a man's brother dies, and leaves his wife behind, and leaves no children, his brother should take his wife and raise up offspring for his brother.
12:20 Now there were seven brothers. The first took a wife; and dying, he left no offspring.