وَحَدَّثَنِي مَالِكٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ يُلِيطُ أَوْلاَدَ الْجَاهِلِيَّةِ بِمَنِ ادَّعَاهُمْ فِي الإِسْلاَمِ فَأَتَى رَجُلاَنِ كِلاَهُمَا يَدَّعِي وَلَدَ امْرَأَةٍ فَدَعَا عُمَرُ بْنُ الْخَطَّابِ قَائِفًا فَنَظَرَ إِلَيْهِمَا فَقَالَ الْقَائِفُ لَقَدِ اشْتَرَكَا فِيهِ فَضَرَبَهُ عُمَرُ بْنُ الْخَطَّابِ بِالدِّرَّةِ ثُمَّ دَعَا الْمَرْأَةَ فَقَالَ أَخْبِرِينِي خَبَرَكِ فَقَالَتْ كَانَ هَذَا - لأَحَدِ الرَّجُلَيْنِ - يَأْتِينِي ‏.‏ وَهِيَ فِي إِبِلٍ لأَهْلِهَا فَلاَ يُفَارِقُهَا حَتَّى يَظُنَّ وَتَظُنَّ أَنَّهُ قَدِ اسْتَمَرَّ بِهَا حَبَلٌ ثُمَّ انْصَرَفَ عَنْهَا فَأُهْرِيقَتْ عَلَيْهِ دِمَاءٌ ثُمَّ خَلَفَ عَلَيْهَا هَذَا - تَعْنِي الآخَرَ - فَلاَ أَدْرِي مِنْ أَيِّهِمَا هُوَ قَالَ فَكَبَّرَ الْقَائِفُ فَقَالَ عُمَرُ لِلْغُلاَمِ وَالِ أَيَّهُمَا شِئْتَ ‏.‏

Malik related to me from Yahya ibn Said from Sulayman ibn Yasarthat Umar ibn al-Khattab used to attach the children of the Jahiliyyato whoever claimed them in Islam. Two men came and each of themclaimed a woman's child. Umar ibn al-Khattab summoned a person whoscrutinized features and he looked at them. The scrutinizer said,"They both share in him." Umar ibn al-Khattab hit him with a whip.Then he summoned the woman, and said, "Tell me your tale." She said,"It was this one (indicating one of the two men) who used to come tome while I was with my people's camels. He did not leave me until hethought and I thought that I was pregnant. Then he left me, and bloodflowed from me, and this other one took his place. I do not know fromwhich of them the child is." The scrutinizer said, "Allah is greater."Umar said to the child, "Go to whichever of them you wish." Translation Not Available

Book Ref: Muwatta Imam Malik Book 36 Hadith 1426
Web Ref:  Muwatta Imam Malik Book 36 Hadith 22