It is narrated from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that one day the Messenger of Allah (peace and blessings be upon him) took hold of my hand and said: "O Mu'adh, by Allah, I love you." I said: "O Messenger of Allah, may my father and mother be sacrificed for you; by Allah, I too love you." He (peace and blessings be upon him) said: "O Mu'adh, I advise you never to leave saying after every prayer: 'Allahumma a'inni 'ala dhikrika wa shukrika wa husni 'ibadatik' (O Allah, help me to remember You, to thank You, and to worship You in the best manner)." Mu'adh gave the same advice to al-Sunabihi, al-Sunabihi to Abu Abd al-Rahman al-Hubuli, and Abu Abd al-Rahman gave the same advice to Uqbah bin Muslim. This hadith has a sahih (authentic) chain, but the two Shaykhs did not record it.