Sayyiduna Amr bin Awf bin Milhah al-Muzani (may Allah be pleased with him) said: We were sitting around the Prophet (peace and blessings be upon him) in his mosque in Madinah when Jibril (peace be upon him) came with revelation. He (peace and blessings be upon him) covered himself with his cloak and remained like that for a long time until that state passed from him and he (peace and blessings be upon him) uncovered his cloak. He (peace and blessings be upon him) was sweating heavily, and there was something in his hand (peace and blessings be upon him) that he was holding tightly. He (peace and blessings be upon him) said: "Which of you knows what comes out of the date palm?" The Ansar said: We know, O Messenger of Allah, may our fathers and mothers be ransomed for you. Whatever comes out of the date palm, we recognise it; we are the owners of date palms. Then he (peace and blessings be upon him) opened his hand, and in it was a date stone. He (peace and blessings be upon him) said: "What is this?" They said: O Messenger of Allah, this is a date stone. He (peace and blessings be upon him) said: "The stone of what?" They said: The stone of one year. He (peace and blessings be upon him) said: "You have spoken the truth. Jibril (peace be upon him) came to you to look after your religion. You will surely follow the ways of those before you, as one sandal matches the other, and you will take as they took: if a span, then a span; if a cubit, then a cubit; and if an arm's length, then an arm's length; so much so that if they entered a lizard's hole, you would enter it too. However, the Children of Israel split after Musa (peace be upon him) into seventy sects, all of them astray except one sect, namely Islam and its community. Then they split after Isa bin Maryam (peace be upon him) into seventy-one sects, all of them astray except one, namely Islam and its community. Then you will split into seventy-two sects, all of them in the Fire except one, namely Islam and its community."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14075