وَعَنْهُ أَيْضًا قَالَ: أَوْصَانِي خَلِيلِي بِثَلَاثٍ: صَوْمِ ثَلَاثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ، وَصَلَاةِ الضُّحَى، وَلَا أَنَامُ إِلَّا عَلَى وَتْرٍ
It is also narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), who says that my beloved (Muhammad, peace and blessings be upon him) gave me these three counsels: to fast three days every month, to perform the Duha (forenoon) prayer, and to sleep after performing the Witr prayer.