We see that the angels will make dua for us when we make dua for people behind their backs. This is reported in a hadith.

Prophet Muhammad (PBUH) told us that “no one of you calls upon Allah for his brother or sister without being seen except that there’s an angel been appointed to him that says ameen and for you as well.”

That angel is now calling upon Allah and asks Allah to give you whatever it is you asked Allah to grant for your brother or sister. The angels are mentioning you to Allah.

Allah and the angels also send their blessing upon the people of the first row in the prayer. On Friday the angels have a scroll and write down who got to the masjid first.