" كان أكثر دعوة يدعوبها: {رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الْآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ}
It was the practice of the Prophet (peace and blessings be upon him):
"The supplication he (peace and blessings be upon him) made most often was: 'Our Lord, give us good in this world and good in the Hereafter, and protect us from the punishment of the Fire.'"
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 4802