Genesis 38:9

NIV: But Onan knew that the child would not be his; so whenever he slept with his brother's wife, he spilled his semen on the ground to keep from providing offspring for his brother.

NAS: Onan knew that the offspring would not be his; so when he went in to his brother's wife, he wasted his seed on the ground in order not to give offspring to his brother.

KJV: And Onan knew that the seed should 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 that he should give seed to his brother.

GWT: But Onan knew that the descendant wouldn't belong to him, so whenever he slept with his brother's widow, he wasted his semen on the ground to avoid giving his brother a descendant.

ASV: 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.

BBE: But Onan, seeing that the offspring would not be his, went in to his brother's wife, but let his seed go on to the earth, so that he might not get offspring for his brother.

DBY: But when Onan knew that the seed should not be his own, it came to pass when he went in to his brother's wife, that he spilled it on the ground, in order to give no seed to his brother.

DRB: He knowing that the children should not be his, when he went in to his brother's wife, spilled his seed upon the ground, lest children should be born in his brother's name.

WBS: And Onan knew that the seed would not be his: and it came to pass, when he went in to his brother's wife, that he frustrated the purpose, lest he should give seed to his brother.

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.

YLT: and Onan knoweth that the seed is not reckoned his; and it hath come to pass, if he hath gone in unto his brother's wife, that he hath destroyed it to the earth, so as not to give seed to his brother;