Bulugh al-Maram, Book 1, Hadith 153 (English) ⓘ
In another version by Al-Bukhari, he said: "And perform ablution for every Salat (prayer)". Abu Dawud and others transmitted a similar narration.
وَفِي رِوَايَةٍ لِلْبُخَارِيِّ: { وَتَوَضَّئِي لِكُلِّ صَلَاةٍ } وَهِيَ لِأَبِي دَاوُدَ وَغَيْرِهِ مِنْ وَجْهٍ آخَرَ.
also referenced under: Book 1, Hadith 171 (In-Book)