تَوْبًا تَوْبًا لِرَبِّنَا أَوْبًا، لَا يُغَادِرُ عَلَيْنَا حَوْبًا
Tawban tawban li Rabbina awban, la yughadiru 'alayna hawban
Returning, repenting to our Lord, not leaving any sin upon us.
Recite when returning home from a journey
Asking Allah to forgive all sins during the journey.