مسند أحمد 3762Saheeh because of corroborating evidence; this is a hasan is
It was narrated from 'Abdullah bin Mas'ood (رضي الله عنه) that There was a man who had never done any good deed except believing in the Oneness of Allah (Tawheed). When he was dying, he said to his family: When I die take me and burn me until I become like charcoal. Then grind me up and scatter me…