I pledged allegiance to the Messenger of Allah may peace and blessings be upon him) on sincerity and well-wishing for every Muslim.
Sahih Muslim Book 1, Hadith 107
← Previous Hadith It is narrated on the authority of Jarir that he observed I gave pledge of allegiance to the Messenger of Allah (may peace and blessings be upon him) on the observance of prayer, payment of Zakat, and sincerity and well-wishing for every Muslim.

Sahih Muslim Book 1, Hadith 106 Next Hadith → I owed allegiance to the Messenger of Allah (may peace and blessings be upon him) on hearing ( is commands) and obeying (them) and the Prophet) instructed me (to act) as lay in my power, and sincerity and goodwill for every Muslim.

Sahih Muslim Book 1, Hadith 108