Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad-zuhd:1369ʿAbdullāh > ʿAlī b. Muslim > ʿAbd al-Ṣamad > Bukayr b. Abū al-Samīṭ

[Machine] About Qatada's statement regarding the saying of Allah, "They used to sleep but little during the night." [Adh-Dhariyat 17], Al-Hasan said: "They would not sleep until they had performed the "Isha" prayer."  

الزهد لأحمد:١٣٦٩حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا عَلِيُّ بْنُ مُسْلِمٍ حَدَّثَنَا عَبْدُ الصَّمَدِ حَدَّثَنَا بُكَيْرُ بْنُ أَبِي السَّمِيطِ

عَنْ قَتَادَةَ فِي قَوْلِ اللَّهِ ﷻ {كَانُوا قَلِيلًا مِنَ اللَّيْلِ مَا يَهْجَعُونَ} [الذاريات 17] قَالَ الْحَسَنُ «مَا يَنَامُونَ حَتَّى يُصَلُّوا الْعَتَمَةَ»