Ibn Abu Mulaika reported:

Ibn Abu Mulaika reported: After the night prayer, Mu’awiya would offer only one cycle of Witr prayer. At the time, a freed slave of Ibn Abbas was present and he disagreed. He went to Ibn Abbas and he said, “Leave him, for he is a companion of the Messenger of Allah, peace be upon him.” [Sahih Bukhari, Book 57, Number 108] عَنْ ابْنِ أَبِي مُلَيْكَةَ قَالَ أَوْتَرَ مُعَاوِيَةُ بَعْدَ الْعِشَاءِ بِرَكْعَةٍ وَعِنْدَهُ مَوْلًى لِابْنِ عَبَّاسٍ فَأَتَى ابْنَ عَبَّاسٍ فَقَالَ دَعْهُ فَإِنَّهُ قَدْ صَحِبَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ 3553 صحيح البخاري كتاب فضائل الصحابة باب ذكر معاوية رضي الله عنه