Hadith 635
Chapter 5: The Book of Mosques and Places of Prayer - كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
وَحَدَّثَنَا هَدَّابُ بْنُ خَالِدٍ الأَزْدِيُّ، حَدَّثَنَا هَمَّامُ بْنُ يَحْيَى، حَدَّثَنِي أَبُو جَمْرَةَ الضُّبَعِيُّ، عَنْ أَبِي بَكْرٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ صَلَّى الْبَرْدَيْنِ دَخَلَ الْجَنَّةَ " .
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 635a
In-book reference : Book 5, Hadith 271
USC-MSA web (English) reference : Book 4, Hadith 1326