It was narrated that Nusair bin Dhu'luq said:
"Ibn 'Umar used to say: 'Do not revile the Companions of Muhammed, for the stay of anyone of them for a brief period (with the Prophet) is better than all the good deeds that anyone of you does in his lifetime.'"
English reference: Vol. 1, Book 1, Hadith 162
Arabic reference: Book 1, Hadith 167