Musannaf Ibn Abi Shaybah

Hazrat Ibn Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) forbade the castration of horses and other animals. And Hazrat Ibn Umar (may Allah be pleased with them both) said: There is an increase of creation in them.

Ibrahim (may Allah have mercy on him) says that Hazrat Umar (may Allah be pleased with him) wrote a letter prohibiting the castration of horses.

Hazrat Ibrahim bin Muhajir al-Bajali, may Allah have mercy on him, narrates that Hazrat Umar, may Allah be pleased with him, wrote a letter: that horses should be castrated and they should not be raced for more than two hundred (units).

Hazrat Yazid bin Abi Habib (may Allah have mercy on him) narrates that Hazrat Umar bin Abdul Aziz (may Allah have mercy on him) wrote a letter forbidding the people of Egypt from castrating horses, and from making children race on horses.

Hazrat Rabi’ bin Anas (may Allah be pleased with him) says that I heard Hazrat Anas (may Allah be pleased with him) saying that in this verse: { وَلآمُرَنَّہُمْ فَلَیُغَیِّرُنَّ خَلْقَ اللہِ }, what is meant is castration.

Ismail (may Allah have mercy on him) says that Abu Salih (may Allah have mercy on him) also stated the same: that what is meant is castration.

Hazrat Abu Makin (may Allah have mercy on him) says that Hazrat Ikrimah (may Allah have mercy on him) considered the castration of animals to be disliked.

Hazrat Laith (may Allah have mercy on him) says that Hazrat Ata, Hazrat Tawus, Hazrat Mujahid (may Allah have mercy on them), Hasan, and Hazrat Shahr (may Allah have mercy on him), all these personalities considered castration to be disliked.

Hazrat Ibn Umar (may Allah be pleased with them both) narrates that Hazrat Umar (may Allah be pleased with him) forbade the castration of animals, and said: "Progeny increases through the reproductive organ."

Hazrat Mutarrif (may Allah have mercy on him) narrates from a man that Hazrat Ibn Abbas (may Allah be pleased with them both) said: To castrate animals is mutilation. And then he (may Allah be pleased with him) recited this verse: { وَلآمُرَنَّہُمْ فَلَیُغَیِّرُنَّ خَلْقَ اللہِ }