سُبْحَانَ اللَّهِ وَبِحَمْدِهِ، أَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ
Subhanallahi wa bihamdihi, astaghfirullaha wa atubu ilayh
Gloire à Allah et louange à Lui. Je demande pardon à Allah et me repens vers Lui.
Recite frequently or after gatherings
The Prophet (PBUH) would say this when getting up from a gathering, and Aisha (RA) noted he said it often after Surah An-Nasr was revealed.