جَزَی اﷲُ عَناَّ مُحَمَّداﹰ صَلَّی اﷲُ ﻋَﻟَﻴْﻪِ وَ سَلَّم ماَّ ﻫُﻮَ ﺃَﻫْﻟُﻪُ
May Allah Reward the Prophet (SAW) on our behalf with that which he is worth

A specific virtue for a specific Durood:

The reward for a person who recites this Durood once is such that 70 angels will be in difficulty for 1000 days due to it. In other words, they will be tired from writing the rewards of this Durood.