Abu Dharr reported:

The Messenger of Allah (ﷺ) said to me: How would you act when you are under the rulers who would delay the prayer beyond its prescribed time, or they would make prayer a dead thing as far as its proper time is concerned? I said: What do you command? He (the Prophet) said: Observe the prayer at Its proper time, and if you can say it along with them do so, for it would be a superetogatory prayer for you. Khalaf (one of the narrators in the above hadith) has not mentioned" beyond their (prescribed) time".

حَدَّثَنَا خَلَفُ بْنُ هِشَامٍ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، ح قَالَ وَحَدَّثَنِي أَبُو الرَّبِيعِ الزَّهْرَانِيُّ، وَأَبُو كَامِلٍ الْجَحْدَرِيُّ قَالاَ حَدَّثَنَا حَمَّادٌ، عَنْ أَبِي عِمْرَانَ الْجَوْنِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ الصَّامِتِ، عَنْ أَبِي ذَرٍّ، قَالَ قَالَ لِي رَسُولُ اللَّهِ ‏"‏ كَيْفَ أَنْتَ إِذَا كَانَتْ عَلَيْكَ أُمَرَاءُ يُؤَخِّرُونَ الصَّلاَةَ عَنْ وَقْتِهَا أَوْ يُمِيتُونَ الصَّلاَةَ عَنْ وَقْتِهَا ‏"‏ ‏.‏ قَالَ قُلْتُ فَمَا تَأْمُرُنِي قَالَ ‏"‏ صَلِّ الصَّلاَةَ لِوَقْتِهَا فَإِنْ أَدْرَكْتَهَا مَعَهُمْ فَصَلِّ فَإِنَّهَا لَكَ نَافِلَةٌ ‏"‏ ‏.‏ وَلَمْ يَذْكُرْ خَلَفٌ عَنْ وَقْتِهَا ‏.‏