A man had come to the Messenger of Allah (ﷺ), he heard him say: "O Messenger of Allah (ﷺ), what should I say when I ask of Allah?" He (ﷺ) said: "Say:

اَللَّهُمَّ اغْفِرْ لِي وَارْحَمْنِيْ وَعَافِنِيْ وَارْزُقْنِيْ

Allaahumma-ghfir li warhamni wa 'aafini warzuqni

O Allah, forgive me, have mercy on me, keep me safe and sound and grant me provision. And he held up his four fingers apart from the thumb and said: "These will combine your religious and worldly affairs."

Reference: Sahih. Ibn Majah: 3845