Man Lā Yaḥḍuruh al-Faqīh

Hadith 604
prayer-etiquette
604 - وَقَالَ اَلنَّبِيُّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ: « «مَنْ كٰانَ يُؤْمِنُ بِاللّٰهِ وَ اَلْيَوْمِ اَلْآخِرِ» فَلاَ يَبِيتَنَّ إِلاَّ بِوَتْرٍ.
Hadith.604 The Prophet, said: "Whoever believes in Allah (swt) and the Last Day should not sleep except in a state of Witr (having performed the Witr prayer)”.
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq