The Messenger of Allah ﷺ said, "My nation will remain upon my way as long as they do not wait for the stars to appear before breaking their fast."He said, Whenever the Prophet ﷺ was fasting, he would instruct a man to climb up onto something high, and when the man announced that the sun had set, he would break his fast.
قال رسول الله ﷺ: لا تزال أمتي على سنتي ما لم تنتظر بفطرها النجوم. قال: وكان النبي ﷺ إذا كان صائما أمر رجلا، فأوفى على شيء، فإذا قال: غابت الشمس أفطر.
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Ibn Khuzayma reported it (2061), and from him Ibn Hibban (3510), and Hakim (1/434), all of them through the hadith of Muhammad bin Abu Safwan Thaqafi, who said, Abdul-Rahman bin Mahdi narrated to us, Sufyan narrated to us, from Abu Hazim, from Sahl bin Saad, and he mentioned it.Ibn Khuzayma said, This is how Ibn Abu Safwan narrated it to us, and I am concerned that the last part of the wording may not be from Sahl bin Saad, but perhaps it is from the words of Thawri or the statement of Abu Hazim, and it was inserted into the hadith. Haythami erred in Mawarid Zaman (891) by omitting this wording, though it is established in Sahih Ibn Hibban, except that Ibn Hibban did not transmit this comment from Ibn Khuzayma, and likewise Hakim did not show any such doubt. The original position is that it is part of the hadith spoken by Sahl bin Saad.Hakim said, "It is sahih according to the standard of the two Shaykhs, though they did not report it with this wording. They only reported through this chain from Thawri, 'People will continue to be well as long as they hasten to break the fast,' and nothing more."I say, Muhammad bin Abu Safwan, who is Muhammad bin Uthman bin Abu Safwan, is not among the narrators of either of the two Sahihs. Rather, the compilers of the Sunan reported from him, and he is trustworthy. The hadith of Thawri is found in Sahih Muslim, as mentioned earlier, without this addition.