I was sitting with Abdullah bin Umar. When the call to the noon prayer was made, he performed ablution and prayed. Then when the call to the afternoon prayer was made, he performed ablution again. I asked him about this, and he said, "The Messenger of Allah ﷺ used to say, 'Whoever performs ablution while already in a state of purity, Allah records ten good deeds for him.'"
حدثنا محمد بن يحيى بن فارس حدثنا عبد الله بن يزيد المقرئ ح و حدثنا مسدد حدثنا عيسى بن يونس قالا حدثنا عبد الرحمن بن زياد قال أبو داود وأنا لحديث ابن يحيى أتقن عن غطيف وقال محمد
كنت عند عبد الله بن عمر فلما نودي بالظهر توضأ فصلى فلما نودي بالعصر توضأ فقلت له فقال كان رسول الله ﷺ يقول من توضأ على طهر كتب الله له عشر حسنات
No references are available.
[Its chain of transmission is daif]. Ibn Majah narrated it in the chapter on Purification, "Wudu Upon Wudu," no. 512, from Muhammad bin Yahya Dhuhli, with the same wording. Tirmidhi also narrated it, no. 59, and graded it daif.Busiri said, "This chain includes Abdul-Rahman bin Ziyad (Afriqi), who is daif, and despite his weakness he was"