كتاب الطهارة وسننها
1  
The Book of Purification and its Sunnah
(72)
Chapter: Performing ablution for each prayer and offering all prayers in one ablution
(72)
باب الْوُضُوءِ لِكُلِّ صَلاَةٍ وَالصَّلَوَاتِ كُلِّهَا بِوُضُوءٍ وَاحِدٍ
Sunan Ibn Majah 509
It was narrated that Anas bin Malik said:
"The Messenger of Allah used to perform ablution for every prayer, and we used to perform all of the prayers with one ablution."
حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا شَرِيكٌ، عَنْ عَمْرِو بْنِ عَامِرٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَتَوَضَّأُ لِكُلِّ صَلاَةٍ وَكُنَّا نَحْنُ نُصَلِّي الصَّلَوَاتِ كُلَّهَا بِوُضُوءٍ وَاحِدٍ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 509
In-book reference : Book 1, Hadith 243
English translation : Vol. 1, Book 1, Hadith 509