Sahih Bukhari Volume 5, Book 64, Hadith 4082

وَقَالَ أَبُو الْوَلِيدِ عَنْ شُعْبَةَ، عَنِ ابْنِ الْمُنْكَدِرِ، قَالَ سَمِعْتُ جَابِرًا، قَالَ لَمَّا قُتِلَ أَبِي جَعَلْتُ أَبْكِي وَأَكْشِفُ الثَّوْبَ عَنْ وَجْهِهِ،، فَجَعَلَ أَصْحَابُ النَّبِيِّ صلى الله عليه وسلم يَنْهَوْنِي وَالنَّبِيُّ صلى الله عليه وسلم لَمْ يَنْهَ، وَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ لاَ تَبْكِيهِ أَوْ مَا تَبْكِيهِ، مَا زَالَتِ الْمَلاَئِكَةُ تُظِلُّهُ بِأَجْنِحَتِهَا حَتَّى رُفِعَ ‏"‏‏

Jabir added, "When my father was martyred, I started weeping and uncovering his face. The companions of the Prophet stopped me from doing so but the Prophet did not stop me. Then the Prophet said, '(O Jabir.) don't weep over him, for the angels kept on covering him with their wings till his body was carried away (for burial)."