533 - Qutaybah informed us, saying: Abu al-Ahwas narrated to us, from Simak, from Jabir ibn Samurah, who said: The Messenger of Allah, peace and blessings be upon him, used to delay the final night prayer.(1)

534 - Muhammad ibn Mansur informed us, saying: Sufyan narrated to us, saying: Abu al-Zinad narrated to us, from al-A'raj, from Abu Hurayrah, that the Messenger of Allah, peace and blessings be upon him, said: "Were it not that I would impose hardship on my ummah, I would have commanded them to delay the night prayer and to use the siwak before every prayer."(2)

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Al-Bukhari attached it in a definitive form from Ibrahim ibn al-Mundhir following hadith (7239), saying: And Ibrahim ibn al-Mundhir said: Ma'n narrated to us, Muhammad ibn Muslim narrated to us, from 'Amr, from 'Ata', from Ibn 'Abbas, from the Prophet, peace and blessings be upon him. Ibn Hajar said: He means (i.e., al-Bukhari) that Muhammad ibn Muslim — namely al-Ta'ifi — narrated it from 'Amr, from 'Ata', as connected with the mention of Ibn 'Abbas in it, and this contradicts the explicit statement of Sufyan ibn 'Uyaynah from 'Amr, that his hadith from 'Ata' does not include Ibn 'Abbas. Thus this is counted among the errors of al-Ta'ifi.
And see the preceding hadith above.

(1) A sound hadith; its narrators are trustworthy, except Simak — namely Ibn Harb — for he is truthful with good hadith. Qutaybah: he is Ibn Sa'id, and Abu al-Ahwas: he is Sallam ibn Sulaym. This hadith does not appear in manuscript (Q).
It was also narrated by Muslim (643): (226), and Ibn Hibban (1534) via the chain of Qutaybah ibn Sa'id, with this isnad.
It was also narrated by Ahmad (20829), his son 'Abdullah in his additions to the "Musnad" (20882) and (20891), Muslim (643): (226), and Ibn Hibban (1527) via various chains from Abu al-Ahwas, with it.
It was also narrated by Muslim (643): (227) via the chain of Abu 'Awanah, from Simak, with it, with the wording: The Messenger of Allah, peace and blessings be upon him, used to pray the prayers similar to your prayers, and he would delay the 'atamah (night prayer) a little after your prayer time, and he would shorten the prayer.
And it has preceded from the hadith of Jabir ibn 'Abdullah (527) with a sound isnad, who said: And the night prayer — sometimes, when he saw that they had gathered, he would hasten it, and when he saw that they had been slow, he would delay it.

(2) Its isnad is sound. Sufyan: he is Ibn 'Uyaynah, and Abu al-Zinad: he is 'Abdullah ibn Dhakwan, and al-A'raj: he is 'Abd al-Rahman ibn Hurmuz. It is in the "Sunan al-Kubra" under number (3034).