Anas told that when Sa'd b. Mu'adh's bier was carried the hypocrites said, "How light his bier is[*]!" that being because of his decision regarding the B. Quraiza. When the Prophet was told of that he said, "The angels were carrying it."
*This was said to show how they despised him because of his decision regarding the B. Quraiza.
Tirmidhi transmitted it.