Sahih Muslim 1438
The Book of Mosques and Places of Prayer
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
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.