Sahih Muslim Book - 7, Hadith - 1955

وَحَدَّثَنِى حَرْمَلَةُ بْنُ يَحْيَى أَخْبَرَنَا ابْنُ وَهْبٍ أَخْبَرَنِى يُونُسُ عَنِ ابْنِ شِهَابٍ حَدَّثَنِى سَالِمُ بْنُ عَبْدِ اللَّهِ عَنْ أَبِيهِ. أَنَّ عُمَرَ بْنَ الْخَطَّابِ بَيْنَا هُوَ يَخْطُبُ النَّاسَ يَوْمَ الْجُمُعَةِ دَخَلَ رَجُلٌ مِنْ أَصْحَابِ رَسُولِ اللَّهِ -صلى الله عليه وسلم- فَنَادَاهُ عُمَرُ أَيَّةُ سَاعَةٍ هَذِهِ فَقَالَ إِنِّى شُغِلْتُ الْيَوْمَ فَلَمْ أَنْقَلِبْ إِلَى أَهْلِى حَتَّى سَمِعْتُ النِّدَاءَ فَلَمْ أَزِدْ عَلَى أَنْ تَوَضَّأْتُ. قَالَ عُمَرُ وَالْوُضُوءَ أَيْضًا وَقَدْ عَلِمْتَ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- كَانَ يَأْمُرُ بِالْغُسْلِ.

Salim bin 'Abdullah narrated from his father that while 'Umar bin Al-Kbattab was addressing the people on a Friday, one of the Companions of the Messenger of Allah (s.a.w) came in. 'Umar called out to him: "What time is this?" He said: "I was busy today and I did not go back to my family when I heard the call, so I did no more than perform Wudu'." 'Umar said: "Just Wudu' while you know that the Messenger of Allah (s.a.w) used to order Ghusl?"