اَلتَّكْوِينُ 38:9

فَعَلِمَ أُونَانُ أَنَّ ٱلنَّسْلَ لَا يَكُونُ لَهُ، فَكَانَ إِذْ دَخَلَ عَلَى ٱمْرَأَةِ أَخِيهِ أَنَّهُ أَفْسَدَ عَلَى ٱلْأَرْضِ، لِكَيْ لَا يُعْطِيَ نَسْلًا لِأَخِيهِ.

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.