وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، أَنَّ أَسْمَاءَ بِنْتَ عُمَيْسٍ، غَسَّلَتْ أَبَا بَكْرٍ الصِّدِّيقَ حِينَ تُوُفِّيَ ثُمَّ خَرَجَتْ فَسَأَلَتْ مَنْ حَضَرَهَا مِنَ الْمُهَاجِرِينَ فَقَالَتْ إِنِّي صَائِمَةٌ وَإِنَّ هَذَا يَوْمٌ شَدِيدُ الْبَرْدِ فَهَلْ عَلَىَّ مِنْ غُسْلٍ فَقَالُوا لاَ ‏.‏

Yahya related to me from Malik from Abdullah ibn Abi Bakr thatAsma bint Umays washed Abu Bakr as-Siddiq when he died. Then she wentout and asked some of the muhajirun who were there, "I am fasting andthis is an extremely cold day. Do I have to do ghusl?" They said,"No." Translation Not Available

Book Ref: Muwatta Imam Malik Book 16 Hadith 525
Web Ref:  Muwatta Imam Malik Book 16 Hadith 3