70:34-35 And those who [carefully] maintain their prayer: They will be in gardens, honored.
It is mentioned in the Quran; “Only in the remembrance of God do hearts find peace”.
Abdullah asked Hazrat Muhammad SAW, who is dearest to Allah? Hazrat Muhammad SAW replied, "The one who performs salah at the appointed time."
4:103 And when you have completed the prayer, remember Allah standing, sitting, or [lying] on your sides. But when you become secure, re-establish [regular] prayer. Indeed, prayer has been decreed upon the believers a decree of specified times.
It is narrated that when the time for Salah sets in, the doors of heaven are opened for the acceptance and the ascent of the good deeds.