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  

[Machine] "Aisha, the wife of the Prophet ﷺ , said, 'By Allah, the Messenger of Allah ﷺ never recited the tasbeeh of Dhuha prayer, but I would recite it. She also said, 'The Messenger of Allah ﷺ used to leave an action even though he loved to do it, for fear that people might consider it obligatory upon them. The Messenger of Allah ﷺ loved whatever was easy for people from the acts of worship."  

أَنَّ عَائِشَةَ زَوْجَ النَّبِيِّ ﷺ قَالَتْ وَاللهِ مَا سَبَّحَ رَسُولُ اللهِ ﷺ سُبْحَةَ الضُّحَى قَطُّ وَإِنِّي لَأُسَبِّحُهَا وَقَالَتْ إِنَّ رَسُولَ اللهِ ﷺ كَانَ يَتْرُكُ الْعَمَلَ وَهُوَ يُحِبُّ أَنْ يَعْمَلَهُ خَشْيَةَ أَنْ يَسْتَنَّ بِهِ النَّاسُ فَيُفْرَضُ عَلَيْهِمْ وَكَانَ رَسُولُ اللهِ ﷺ يُحِبُّ مَا خَفَّ عَلَى النَّاسِ مِنَ الْفَرَائِضِ  

[Machine] "Aisha used to say that the Messenger of Allah ﷺ never used to perform the Sunnah of Dhuha prayer. She would perform it and she would say: 'Verily, the Messenger of Allah ﷺ would abstain from performing this voluntary prayer, out of fear that people would consider it obligatory upon them.'"  

أَنَّ عَائِشَةَ كَانَتْ تَقُولُ مَا كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي سُبْحَةَ الضُّحَى قَالَ وَكَانَتْ عَائِشَةُ تُسَبِّحُهَا وَكَانَتْ تَقُولُ إِنَّ رَسُولَ اللهِ ﷺ كَانَ يَتْرُكُ الْعَمَلَ خَشْيَةَ أَنْ يَسْتَنَّ بِهِ النَّاسُ فَيُفْرَضَ عَلَيْهِمْ