Whenever a person embraced Islam, Allah's Messenger (ﷺ) instructed him to recilte -

اَللَّهُمَّ اغْفِرْ لِي، وَارْحَمْنِي، وَاهْدِنِي، وَعَافِنِي وَارْزُقْنِي

Allaahummaghfir lee, warhamnee, wahdinee, wa 'aafinee warzuqnee

O Allah, forgive me, have mercy upon me, guide me and grant me sustenance. Another narration of Muslim says, "These will combine everything in this world and the Hereafter for you."

Reference: Muslim: 2697