What was narrated concerning (voluntary) Prayers at night and during the day are two by two
حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ الْهَمْدَانِيُّ، حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ، عَنْ أَبِي سُفْيَانَ السَّعْدِيِّ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ أَنَّهُ قَالَ " فِي كُلِّ رَكْعَتَيْنِ تَسْلِيمَةٌ " .
It was narrated from Abu Sa’eed that the Prophet (ﷺ) said: “After each two Rak’ah there should be the Taslim.”