"The Messenger of Allah ﷺ cae out from the toilet and some food was brought to him. They said: 'Shall we bring you some water for Wudu'?' He said: 'I have only been ordered to perform Wudu' when standing for Salat.'" (Using translation from Tirmidhī 1847)
أَنَّ النَّبِيَّ ﷺ خَرَجَ مِنَ الخَلاءِ فَأُتِيَ بِطَعَامٍ فَقِيلَ لَهُ أَلا تَتَوَضَّأُ؟ فَقَالَ إِنَّمَا أُمِرْتُ بِالْوُضُوءِ إِذَا قُمْتُ إِلَى الصَّلاةِ