Al-Kāfi - Volume 6 > The Relation between a Stumper and the Rider
Hadith #8

عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قَالَ رَسُولُ اللَّهِ ( صلى الله عليه وآله ) مِنْ سَعَادَةِ الْمَرْءِ الْمُسْلِمِ الْمَرْكَبُ الْهَنِي‏ءُ .

8. Ali ibn Ibrahim has narrated from his father from al-Nawfaliy from al-Sakuniy who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘It is of the good fortune of a Muslim man to have a healthy stumper.’”