It was narrated from Sufyan, from 'Amr who said he heard Jabir say:

"The Prophet (ﷺ) came to the grave of 'Abdullah bin Ubayy when he had been placed in his grave and stood over it. He commanded that he be brought out to him and placed on his knees, and he dressed him in his shirt and blew on him (for blessing). And Allah knows best."

أَخْبَرَنَا عَبْدُ الْجَبَّارِ بْنُ الْعَلاَءِ بْنِ عَبْدِ الْجَبَّارِ، عَنْ سُفْيَانَ، عَنْ عَمْرٍو، قَالَ سَمِعْتُ جَابِرًا، يَقُولُ أَتَى النَّبِيُّ صلى الله عليه وسلم قَبْرَ عَبْدِ اللَّهِ بْنِ أُبَىٍّ وَقَدْ وُضِعَ فِي حُفْرَتِهِ فَوَقَفَ عَلَيْهِ فَأَمَرَ بِهِ فَأُخْرِجَ لَهُ فَوَضَعَهُ عَلَى رُكْبَتَيْهِ وَأَلْبَسَهُ قَمِيصَهُ وَنَفَثَ عَلَيْهِ مِنْ رِيقِهِ وَاللَّهُ تَعَالَى أَعْلَمُ ‏.‏