Sayyiduna Mu'awiyah bin Hudayj (may Allah be pleased with him), who had the honour of being a Companion, says: Whoever washes a deceased person, shrouds him, goes with the funeral and takes charge of his body, by the time he returns he has been forgiven.
Ahmad recorded it. Its chain contains a narrator, Salih Abu Hujayr, and he is majhul (unknown).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الجنائز / 4070