كتاب المواقيت
6  
The Book of the Times (of Prayer)
(47)
Chapter: Combining Two Prayers While A Resident
(47)
باب الْجَمْعِ بَيْنَ الصَّلاَتَيْنِ فِي الْحَضَرِ
Sunan an-Nasa'i 601
It was narrated that Ibn 'Abbas said:
"The Messenger of Allah (ﷺ) prayed Zuhr and 'Asr together, and Maghrib and 'Isha' together, when there was no fear and he was not traveling."
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ أَبِي الزُّبَيْرِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ صَلَّى رَسُولُ اللَّهِ صلى الله عليه وسلم الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا مِنْ غَيْرِ خَوْفٍ وَلاَ سَفَرٍ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 601
In-book reference : Book 6, Hadith 108
English translation : Vol. 1, Book 6, Hadith 602