The Book of Mosques and Places of Prayer
5/41. Chapter:
It is disliked to delay the prayers beyond their proper times, and what a person should do if the Imam delays the prayer
Sahih Muslim
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا جَعْفَرُ بْنُ سُلَيْمَانَ، عَنْ أَبِي عِمْرَانَ الْجَوْنِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ الصَّامِتِ، عَنْ أَبِي ذَرٍّ، قَالَ قَالَ لِي رَسُولُ اللَّهِ صلى الله عليه وسلم " يَا أَبَا ذَرٍّ إِنَّهُ سَيَكُونُ بَعْدِي أُمَرَاءُ يُمِيتُونَ الصَّلاَةَ فَصَلِّ الصَّلاَةَ لِوَقْتِهَا فَإِنْ صَلَّيْتَ لِوَقْتِهَا كَانَتْ لَكَ نَافِلَةً وَإِلاَّ كُنْتَ قَدْ أَحْرَزْتَ صَلاَتَكَ " .
Abu Dharr reported: The Messenger of Allah (ﷺ) said to me: O Abu Dharr, you would soon find after me rulers who would make their prayers dead. You should say prayer at its prescribed time. If you say prayer at its prescribed time that would be a supererogatory prayer for you, otherwise you saved your prayer.
Reference : Sahih Muslim 648bIn-book reference : Book 5, Hadith 299USC-MSA web (English) reference : Book 4, Hadith 1354