'Umar (RA) reported Allah's Messenger (ﷺ) as saying: When the night approaches and the day retreates and the sun sinks down, then the observer of the fast should break it. Ibn Numair made no mention of the word "then".
'Abdullah bin Abi Aufa reported: We were with the Messenger of Allah (ﷺ) on a journey during the month of Ramadan. When the sun had sunk he said: So and so, get down (from your ride) and prepare the meal of parched barley for us. He said: Messenger of Allah, still there is light of day. He (the Holy Prophet) said: Get down and prepare meal of parched barley for us. So he got down and prepared the meal of parched barley and offered him, and the apostle of Allah (ﷺ) drank that (liquid meal). He then told with the gesture of his hand that when the sun sank from that side and the night appeared from that side, then the observer of the fast should break it.
Ibn Abi Aufa (RA) reported: We were with the Messenger of Allah (ﷺ) on a journey. When the sun sank he said to a person: Get down and prepare barley meal for us. Upon this he said: Messenger of Allah, let there be dusk. (He the Holy Prophet) said: Get down and prepare barley meal for us. He (the person) said: There is still (the light of) day upon us. (But) he got down (in obedience to the command of the Holy Prophet) and prepared a barley meal for him and he (the Holy Prophet) drank that (liquid meal) and then said: When you see the night approaching from that side (west) (and he pointed towards the east with his hand), then the observer of the fast should break it.
Abdullah bin Abi Aufa (RA) reported: We travelled with the Messenger of Allah (ﷺ) as he had been observing fast. When the sun sank he said: So and so, get down and prepare barley meal for us. The rest of the hadith is the same.
And Ibn Abi ‘Umar narrated to us, Sufyan informed us. And Ishaq narrated to us, Jarir informed us, both of them from al-Shaybani, from Ibn Abi Awfa. And ‘Ubaydullah ibn Mu‘adh narrated to us, my father narrated to us. And Ibn al-Muthanna narrated to us, Muhammad ibn Ja‘far narrated to us, they said: Shu‘bah narrated to us, from al-Shaybani, from Ibn Abi Awfa, may Allah be pleased with him, from the Prophet, peace and blessings be upon him, with the meaning of the hadith of Ibn Mus-hir, and ‘Abbad, and ‘Abd al-Wahid, and there is not in the hadith of any of them: “in the month of Ramadan,” nor his saying: “and the night has come from here,” except in the narration of Hushaym alone.