There came a person to the Prophet (may peace he upon him) ) from Banu Fazara and said: My wife has given birth to a child who is black, whereupon Allah's Apostle ﷺ said: Have you any camels? He said: Yes. He again said: What is this colour? He said: They are red. He said: Is there a dusky one among them? He said: Yes, there are dusky ones among them He said: How has it come about? He said: It is perhaps the strain to which it has reverted, whereupon he (the Holy Prophet) said: It is perhaps the strain to which he (the child) has reverted. (Using translation from Muslim 1500a)

جَاءَ رَجُلٌ مِنْ بَنِي فَزَارَةَ إِلَى النَّبِيِّ ﷺ فَقَالَ إِنَّ امْرَأَتِي وَضَعَتْ غُلَامًا أَسْوَدَ فَقَالَ لَهُ النَّبِيُّ ﷺ «هَلْ لَكَ مِنْ إِبِلٍ» قَالَ نَعَمْ قَالَ «فَمَا أَلْوَانُهَا» قَالَ حُمْرٌ قَالَ «هَلْ فِيهَا مِنْ أَوْرَقَ» قَالَ إِنَّ فِيهَا وُرْقًا قَالَ «فَأَنَّى أَتَاهُ ذَلِكَ» قَالَ عَسَى أَنْ يَكُونَ نَزَعَهُ عِرْقٌ قَالَ «وَهَذَا عَسَى أَنْ يَكُونَ نَزَعَهُ عِرْقٌ»