"My wife has given birth to a black boy." The Messenger of Allah said: "Do you have camels?" He said: "Yes." He said: "What color are they?" He said: "Red." He said: "Are there any gray ones among them?" He said: "There are some gray ones among them." He said: "Where do you think they come from?" He said: "Perhaps it is hereditary." He said: "Likewise, perhaps this is hereditary." (Using translation from Nasāʾī 3478)
أَنَّ رَجُلًا مِنْ بَنِي فَزَارَةَ أَتَى رَسُولَ اللَّهِ ﷺ فَقَالَ إِنَّ امْرَأَتِي وَلَدَتْ غُلَامًا أَسْوَدَ فَقَالَ رَسُولُ اللَّهِ ﷺ «هَلْ لَكَ مِنْ إِبِلٍ» قَالَ نَعَمْ قَالَ «فَمَا أَلْوَانُهَا» قَالَ حُمْرٌ قَالَ «فَهَلْ فِيهَا مِنْ أَوْرَقٍ» فَقَالَ إِنَّ فِيهَا لَوُرْقًا قَالَ «فَأَنَّى تَرَاهُ ذَلِكَ» فَقَالَ «عَسَى أَنْ يَكُونَ نَزَعَهُ عِرْقٌ فَقَالَ النَّبِيُّ ﷺ «وَهَذَا عَسَى أَنْ يَكُونَ نَزَعَهُ عِرْقٌ»