Qatadah asked Anas:

Which Supplication would the Prophet ﷺ often make ? He replied: The supplication he would usually recite was: "O Allah, give us in this world what is good and in the next what is good, and protect us from the punishment of Hell-fire".

The version of Ziyad adds: When Anas wished to supplicate, he uttered this supplication. When he uttered some other supplication, he combined it with this supplication.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا عَبْدُ الْوَارِثِ، ح وَحَدَّثَنَا زِيَادُ بْنُ أَيُّوبَ، حَدَّثَنَا إِسْمَاعِيلُ، - الْمَعْنَى - عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ، قَالَ سَأَلَ قَتَادَةُ أَنَسًا أَىُّ دَعْوَةٍ كَانَ يَدْعُو بِهَا رَسُولُ اللَّهِ ﷺ أَكْثَرَ قَالَ كَانَ أَكْثَرُ دَعْوَةٍ يَدْعُو بِهَا " اللَّهُمَّ رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ " . وَزَادَ زِيَادٌ وَكَانَ أَنَسٌ إِذَا أَرَادَ أَنْ يَدْعُوَ بِدَعْوَةٍ دَعَا بِهَا وَإِذَا أَرَادَ أَنْ يَدْعُوَ بِدُعَاءٍ دَعَا بِهَا فِيهَا .