عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَجُلٌ: كَمْ يَكْفِينِي مِنَ الْوُضُوءِ؟ قَالَ: مُدٌّ، قَالَ: كَمْ يَكْفِينِي لِلْغُسْلِ؟ قَالَ: صَاعٌ، قَالَ: فَقَالَ الرَّجُلُ: لَا يَكْفِينِي، قَالَ: لَا أُمَّ لَكَ قَدْ كَفَى مَنْ هُوَ خَيْرٌ مِنْكَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ
It is narrated from Sayyiduna Abdullah bin Abbas that a man asked: How much water is sufficient for me for ablution? He replied: One mudd. The man asked: How much water is sufficient for me for bathing? He replied: One sa‘. Upon hearing this, the man said: This amount will not suffice for me. He (Ibn Abbas) said: May your mother lose you! This amount was sufficient for the one who is better than you, that is, the Messenger of Allah, peace and blessings be upon him.