English translation
128. Narrated Anas bin Mālik رَضِيَ اللَّهُ عَنْهُ: "Once Mu’ādh was riding behind Allāh's Messenger as a companion rider. Allāh's Messenger said, "O Mu'ādh bin Jabal." Mu'ādh replied, "Labbaik and Sa'daik,(1) O Allāh's Messenger!" Again the Prophet ﷺ said, "O Mu'ādh!" Mu'ādh said thrice, "Labbaik and Sa'daik, O Allāh's Messenger!" Allāh's Messenger ﷺ said, "There is none who testifies sincerely from his heart that Lā ilāha illallāh wa anna Muḥammad-ar-Rasul Allāh" (none has the right to be worshipped but Allāh and Muḥammad ﷺ is the Messenger of Allāh), except that Allāh تعالى will save him from the Hell-fire." Mu'ādh said, "O Allāh's Messenger! Should I not inform the people about it, so that they may have glad tidings?" He replied, "When (the people hear about it), they will solely depend on it." Then Mu'ādh narrated the above mentioned Hadīth just before his death, being afraid of committing a sin (by concealing the knowledge).