The Messenger of Allah (may Allah's peace and blessings be upon him) spat on the leg of ‘Amr ibn Mu‘ādh when his leg was cut off, so he was healed

Explanation of the hadith

When the leg of ‘Amr ibn Mu‘ādh,(may Allah be pleased with him) was cut off, the Prophet (may Allah's peace and blessings be upon him) spat his pure saliva on it, so ‘Amr was recovered and healed by Allah's permission. This was an evident miracle of the Prophet (may Allah's peace and blessings be upon him).