"Radheetu billaahi Rabban, wa bil-'Islaami deenan, wa bi-Muhammadin (sallallaahu 'alayhi wa sallama) Nabiyyan."Recite these words & Get your sins forgiven Or Be Pleased on the Day of Qiyamah, Insha Allah!
1) Prophet (sallAllahu 'alyhi wasallam) said: "Allah has promised that anyone who says
•► Radheetu billaahi Rabban, wa bil-'Islaami deenan, wa bi-Muhammadin (sallallaahu 'alayhi wa sallama) Nabiyyan. {I am pleased with Allah as my Lord, with Islam as my religion and with Muhammad as my Prophet}
...THREE times every morning & evening will be pleased on the Day of Resurrection."
[Ahmad 4/ 337, An-Nasa'i, 'Amalul-Yawm wal-Laylah p. 4, Ibn As-Sunni (no. 68), At-Tirmithi 5/465]
2) Sa'd ibn Abi Waqqas reported that the Prophet, (sallAllahu 'alyhi wasallam) said: "Anyone who says, when he hears the mu'adhdhin (after the adhaan),
•► 'I testify that there is no god but Allah alone with no partner and that Muhammad is His slave and Messenger. I am pleased with Allah as Lord, with Muhammad as Messenger, and Islam as deen,' will have his wrong actions forgiven."
[Muslim 1/290]