عَنْ عِمْرَانَ بْنِ حُصَيْنٍ رَضِيَ اللَّهُ عَنْهُ قَالَ مَا قَامَ فِينَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ خَطِيبًا إِلَّا أَمَرَنَا بِالصَّدَقَةِ وَنَهَانَا عَنِ الْمُثْلَةِ قَالَ وَقَالَ أَلَا وَإِنَّ مِنَ الْمُثْلَةِ أَنْ يَنْذُرَ الرَّجُلُ أَنْ يَخْرِمَ أَنْفَهُ أَلَا وَإِنَّ مِنَ الْمُثْلَةِ أَنْ يَنْذُرَ الرَّجُلُ أَنْ يَحُجَّ مَاشِيًا فَلْيُهْدِ هَدْيًا وَلْيَرْكَبْ
It is narrated from Sayyiduna Imran bin Husain (may Allah be pleased with him), he says: Whenever the Messenger of Allah (peace and blessings be upon him) stood among us to address, he (peace be upon him) would command us to give charity and forbid mutilation. Then he said: Beware! This is mutilation, that a man vows to cut off his slave’s nose; this is also mutilation, that a man vows to perform Hajj on foot. He should offer a sacrifice (slaughter an animal) and ride.