Musnad Ahmad 550:1

'Affan narrated to us, Abu Khalaf Musa bin Khalaf—who used to be counted among the *Budala*—narrated to us, he said: Yahya bin Abi Kathir narrated to us, from Zayd bin Salam, from his grandfather Mamtur, from al-Harith al-Ash'ari, that the Prophet of Allah (ﷺ) said: "Indeed, Allah commanded Yahya bin Zakariyya with five words: that he should act upon them, and that he should command the Children of Israel to act upon them. He was about to delay, so 'Isa said to him: 'You have been commanded with five words, to act upon them and to command the Children of Israel to act upon them; so either you convey them, or I shall convey them.' He said to him: 'O my brother, I fear that if you precede me, I will be punished or the earth will swallow me.' He said: So Yahya gathered the Children of Israel in Bayt al-Maqdis until the mosque was filled, and he sat on the elevated platform. He praised Allah and extolled Him, then said: 'Indeed, Allah has commanded me with five words, that I act upon them and command you to act upon them: The first of them: That you worship Allah and do not associate anything with Him. For the likeness of that is the likeness of a man who bought a slave with his own pure wealth, in silver or gold, and the slave began to work and deliver his work to someone other than his master. Which of you would be pleased that his slave be like that? And Allah created you and provided for you, so worship Him and do not associate anything with Him. And I command you to pray, for Allah directs His Face toward the face of His servant as long as he does not turn away; so when you pray, do not turn away. And I command you to fast, for the likeness of that is the likeness of a man who has a pouch of musk among a group of people, all of whom find the scent of the musk. And indeed, the smell of the mouth of the fasting person is more pleasant to Allah than the scent of musk. And I command you to give charity, for the likeness of that is the likeness of a man whom the enemy captured, and they tied his hands to his neck and brought him forward to strike his neck. He said: "Will you accept that I ransom myself from you?" So he began to ransom himself from them with a little and a lot, until he freed himself. And I command you to remember Allah much, for the likeness of that is the likeness of a man whom the enemy pursued swiftly in his tracks, until he came to a fortified stronghold and took refuge in it. And the servant is most protected from Satan when he is in the remembrance of Allah.'" He said: And the Messenger of Allah (ﷺ) said: "And I command you with five that Allah commanded me with: the community (*al-jama'ah*), listening, obeying, migration (*hijrah*), and jihad in the way of Allah. For whoever departs from the community by a span, he has cast off the yoke of Islam from his neck until he returns. And whoever calls with the call of *Jahiliyyah* (pre-Islamic ignorance), he is among the heap of Hell." They said: "O Messenger of Allah, even if he fasts and prays?" He said: "Even if he fasts and prays and claims that he is a Muslim. So call the Muslims by the names Allah has named them: the Muslims, the believers, the servants of Allah."