It was narrated that Abbu Ishaq said:

"I heard Najiyah bin Ka'b narrating from 'Ali that he came to the Prophet ﷺ and said: 'Abu Talib has died.' He said: 'Go and bury him.' He said: 'He died as an idolator.' He said: 'Go and bury him.' ('Ali said:) 'When I had buried him I went back to him and he said to me: 'Perform Ghusl.'"

أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ مُحَمَّدٍ، قَالَ حَدَّثَنِي شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، قَالَ سَمِعْتُ نَاجِيَةَ بْنَ كَعْبٍ، عَنْ عَلِيٍّ، رضى الله عنه أَنَّهُ أَتَى النَّبِيَّ ﷺ فَقَالَ إِنَّ أَبَا طَالِبٍ مَاتَ . فَقَالَ " اذْهَبْ فَوَارِهِ " . قَالَ إِنَّهُ مَاتَ مُشْرِكًا . قَالَ " اذْهَبْ فَوَارِهِ " . فَلَمَّا وَارَيْتُهُ رَجَعْتُ إِلَيْهِ فَقَالَ لِي " اغْتَسِلْ " .