عَنْ دَحْيَةَ الْكَلْبِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَلَا أَحْمِلُ لَكَ حِمَارًا عَلَى فَرَسٍ فَيُنْتِجَ لَكَ بَغْلًا فَتَرْكَبُهَا قَالَ إِنَّمَا يَفْعَلُ ذَلِكَ الَّذِينَ لَا يَعْلَمُونَ
It is narrated from Sayyiduna Dihyah Kalbi (may Allah be pleased with him), he says: I said, "O Messenger of Allah! Should I not have a mare mated with a donkey for you, so that a mule is produced and you may ride on it?" But the Prophet (peace and blessings be upon him) said: "Those who do not have knowledge do this act."