Qatada asked Anas which Supplication Allah's Apostle (ﷺ) frequently made. He said: The supplication that he (the Holy Prophet) made very frequently is this: "O Allah, grant us the good in this world and the good in the Hereafter and save us from the torment of Hell-Fire." He (Qatada) said that whenever Anas had to supplicate he made this very supplication, and whenever he (intended) to make another supplication he (inserted) this very supplication in that.
Hadith Referenceصحيح مسلم / كتاب الذكر والدعاء والتوبة والاستغفار / 2690
Anas reported that Allah's Messenger (ﷺ) used to supplicate (in these words): "Our Lord, grant us the good in this world and the good in the Hereafter and save us from the torment of Hell Fire."
Hadith Referenceصحيح مسلم / كتاب الذكر والدعاء والتوبة والاستغفار / 2690