Rasulullah berwudhu sekali sekali
Imam Ahmad : 966حَدَّثَنَا عَبْد اللَّهِ حَدَّثَنَا إِسْحَاقُ حَدَّثَنَا سُفْيَانُ مَرَّةً أُخْرَى قَالَ رَأَيْتُ عَلِيًّا رَضِيَ اللَّهُ عَنْهُ تَوَضَّأَ فَمَسَحَ ظُهُورَهُمَا
Narrated to us Abdullah, Narrated to us [Ishaq] Narrated to us [Sufyan] in another place, saying; "I saw [Ali] Radhiallah 'anhu performing ablution and wiping the tops of his feet.
Hadith Corroboration :
Imam Ahmad : 144, 146, 550, 831, 966, 1296, 1968, 2291, 2913, 15106, 15845, 15869, 17381, 25782, 25786
Imam Bukhari : 137, 153
Imam Abu Dawud : 102, 104, 106, 109, 110, 111, 113, 118, 119, 120
Imam Tirmidzi : 32, 40
Imam Nasa'i : 79, 100, 101
Imam Ibnu Majah : 397, 399, 405, 406, 429, 430, 431, 437, 438, 439
Imam Darimi : 693, 705