Musnad Ahmad Hadith 21447

It is narrated from Abu Dharr (may Allah be pleased with him) that once we observed the fasts of Ramadan with the Prophet Muhammad (ﷺ). The Prophet (ﷺ) did not perform Qiyam (night prayer) with us for the entire month. When the 24th night came, the Prophet (ﷺ) performed Qiyam with us until about a third of the night had passed. When the next night came, the Prophet (ﷺ) did not perform Qiyam with us again. On the 26th night, he performed such a long Qiyam with us that about half of the night had passed. I said, "O Messenger of Allah! If only you would continue to lead us in prayer for the rest of the night?" The Prophet (ﷺ) said, "No. When a person stands with the Imam and remains with him until he finishes, it is as if he has spent the whole night in prayer." On the next night, the Prophet (ﷺ) again did not perform Qiyam with us. On the 28th night, the Prophet (ﷺ) gathered his family, and the people also gathered. The Prophet (ﷺ) led us in prayer for so long that we feared missing 'Falah.' I asked about the meaning of 'Falah,' and he explained that it means Suhoor (pre-dawn meal). Then he said, "O nephew! After that, the Prophet (ﷺ) did not perform Qiyam with us on any night of the month."