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Genesis 38:9

9 And Onan knew that the seed would not be his; and it came to pass, when he went in unto his brother's wife, that he spilled it on the ground, lest he should give seed to his brother.

Genesis 38:9

9 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.

Genesis 38:9

9 But Onan knew that the child wouldn't be his, so whenever he slept with his brother's widow he spilled his semen on the ground so he wouldn't produce a child for his brother.