My beloved friend advised me to do three things which I will not abandon until I die: fasting three days of every month, praying Duha, and sleeping only after performing Witr.
أوصاني خليلي بثلاث لا أدعهن حتى أموت، صوم ثلاثة أيام من كل شهر، وصلاة الضحى، ونوم على وتر.
Bukhari reported it in the Book of Tahajjud (1178), and Muslim in the Book of the Prayer of Travelers (721), both through Shubah, who said, Abbas Jariri, who is Ibn Faruq, narrated to us, from Abu Uthman Nahdi, from Abu Hurairah, and he mentioned it.