'Abdul Rahman bin Abd 'Amr reported: 'Uthman bin 'Affan (narrated the mosque after evening prayer and sat alone. I also sat alone with him, so he said: 0, son of my brother, I heard the Messenger of Allah (ﷺ) say: He who observed the 'Isha' prayer in congregation, it was as if he prayed up to the midnight, and he who prayed the morning prayer in congregation, it was as if he prayed the whole night.
Hadith Referenceصحيح مسلم / كتاب المساجد ومواضع الصلاة / 656
Uthman bin Affan reported the Messenger of Allah (may peace be him) as saying; if anyone says the night prayer in congregation, he is like one who keeps vigil (in prayer) till midnight; and he who says both the night and dawn prayer in congregation is like one who keeps vigil (in prayer) the whole night.
Shaykh Umar Farooq Saeedi
555. Commentary: And whoever, after performing these prayers in congregation, also stands (in prayer) during the night, his rank will be exceedingly high.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 555