[Machine] I said, "O Messenger of Allah, shall I not carry a donkey for you on a horse so that it produces a mule for you to ride?" He said, "This is only done by those who do not know."  

قُلْتُ يَا رَسُولَ اللهِ أَلَا أَحْمِلُ لَكَ حِمَارًا عَلَى فَرَسٍ فَتُنْتِجَ لَكَ بَغْلًا فَتَرْكَبُهَا؟ قَالَ إِنَّمَا يَفْعَلُ ذَلِكَ الَّذِينَ لَا يَعْلَمُونَ