"The Messenger of Allah ﷺ was brought a small vessel (of water) and he performed Wudu'." I said: "Did the Messenger of Allah ﷺ perform Wudu' for every prayer?" He said: "Yes." He said: "What about you?" He said: "We used to pray all the prayers so long as we did not commit Hadath." He said: "And we used to pray all the prayers with (one) Wudu'."
أَنَّ النَّبِيَّ ﷺ أُتِيَ بِإِنَاءٍ صَغِيرٍ فَتَوَضَّأَ قُلْتُ أَكَانَ النَّبِيُّ ﷺ يَتَوَضَّأُ لِكُلِّ صَلاَةٍ قَالَ نَعَمْ قَالَ فَأَنْتُمْ قَالَ كُنَّا نُصَلِّي الصَّلَوَاتِ مَا لَمْ نُحْدِثْ قَالَ وَقَدْ كُنَّا نُصَلِّي الصَّلَوَاتِ بِوُضُوءٍ