The Messenger of Allah ﷺ never offered prayer in the forenoon, but I offer it. The Messenger of Allah ﷺ would give up an action, though he liked it to do, lest the people should continue it and it is prescribed for them. (Using translation from Abū Dāʾūd 1293)
عَنْ عَائِشَةَ زَوْجِ النَّبِيِّ ﷺ أَنَّهَا قَالَتْ مَا صَلَّى رَسُولُ اللهِ ﷺ سُبْحَةَ الضُّحَى قَطُّ وَإِنِّي لَأُسَبِّحُهَا وَإِنْ كَانَ رَسُولُ اللهِ ﷺ لَيَدَعُ الْعَمَلَ وَهُوَ يُحِبُّ أَنْ يَعْمَلَ بِهِ خَشْيَةَ أَنْ يَعْمَلَ بِهِ النَّاسُ فَيُفْرَضَ عَلَيْهِمْ