Durood

Jibra'el (a.s) once came to Prophet Mohammed (s.a.w.s) and said: "Allah has given me the knowledge to count every leaf on earth, every fish in the sea, every star in the sky, every particle of sand on earth, but there's only one thing I cannot count."

Prophet Mohammed (s.a.w.s) asked Jibra'el (a.s) "What is it?" 

Jibra'el (a.s) replied: "When one of your Ummah recites Durood (Salaams to you), the blessing Allah showers upon him becomes impossible for me to count."

Hadith on blessings for reciting Durood

Jibraeel (A.S) Once came to Rasulullah (PBUH) n Said Allah (SWT) has given me the Knowledge to Count Every Leaf on Earth, Every Fish in the Sea, Every Star in the Sky & Every Particle of Sand on Earth, But there's Only One Thing I cant Count......... Rasulullah (PBUH) asked Jibraeel (A.S) WHAT IS IT.........................................???

Jibraeel (A.S) answer to Rasulullah (PBUH) WHEN ONE OF YOUR UMMATII RECITES DUROOD OR SALAM FOR YOU, Blessing Allah (SWT) showers upon him becomes impossible for me to count!!!!!!