(37) باب فَضْلِ صَلاَتَىِ الصُّبْحِ وَالْعَصْرِ وَالْمُحَافَظَةِ عَلَيْهِمَا
Abu Bakr reported on the authority of his father that the Messenger of Allah (ﷺ) said:
He who observed two prayers at two cool (hours) would enter Paradise.
Reference: Sahih Muslim 635 a
In-book reference: Book 5, Hadith 274
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1326