Sayyiduna Uthman bin Affan (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "One congregational 'Isha prayer is equal to standing in prayer for half the night, and performing the Fajr prayer in congregation is equal to standing in prayer for the remaining half of the night."
Hadith Referenceمعجم صغير للطبراني / كتاب الصلوٰة / 277
Hadith Gradingمحدثین:صحيح
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 656، 656، ومالك فى «الموطأ» برقم: 294، وابن خزيمة فى «صحيحه» برقم: 1473، وابن حبان فى «صحيحه» برقم: 2058، 2059، وأبو داود فى «سننه» برقم: 555، والترمذي فى «جامعه» برقم: 221، والدارمي فى «سننه» برقم: 1224، والبيهقي فى«سننه الكبير» برقم: 2213، 5042، وأحمد فى «مسنده» برقم: 415، 416، 498، والطبراني فى«الكبير» برقم: 148، والطبراني فى «الأوسط» برقم: 4991، 6257، والطبراني فى «الصغير» برقم: 757»
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