Ibn Umar reported: The Prophet, peace and blessings be upon him, would pray at night, two by two, and make it odd with one cycle. The Prophet would pray two cycles before the morning prayer, so lightly as if the call to prayer were in his ears.
Source: Ṣaḥīḥ al-Bukhārī 995, Ṣaḥīḥ Muslim 749
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ ابْنِ عُمَرَ كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي مِنْ اللَّيْلِ مَثْنَى مَثْنَى وَيُوتِرُ بِرَكْعَةٍ وَيُصَلِّي الرَّكْعَتَيْنِ قَبْلَ صَلَاةِ الْغَدَاةِ وَكَأَنَّ الْأَذَانَ بِأُذُنَيْهِ
995 صحيح البخاري كتاب الوتر باب ساعات الوتر
749 صحيح مسلم كتاب صلاة المسافرين وقصرها باب صلاة الليل مثنى مثنى والوتر ركعة من آخر الليل