Anas told that when God's messenger prayed the dawn prayer the servants in Medina brought their vessels containing water and they would not bring a vessel into which he did not dip his hand. They would often bring them on a cold morning and he would dip his hand into them. Muslim transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الفضائل والشمائل / 5808
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «رواه مسلم (74/ 2324)»