It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she said: Had I known beforehand what I came to know afterwards, none but his (peace and blessings be upon him) wives would have washed him (peace and blessings be upon him).
The Shaykh said: She expressed regret over that, and one only regrets something that is permissible.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6665