The Messenger of Allah (salAllaahu alayhi wa sallam) said:
“The group prayer is 25 degrees higher than the prayer in your house or the prayer in your place of business. Anyone who does wudu and goes to the masjid with no other object than to do the prayer, Allaah will raise him up a degree with every step he takes, 
and a wrong action will fall away from him. When he prays, the angels pray for him all the time he is in his place of prayer, ‘O Allaah, Forgive him! O Allaah, Show mercy to him!’ One of you is in the prayer as long as he is waiting for the prayer.”
~ [Bukhari]