Istighfar

Istighfar (Arabic: ٱسْتِغْفَار, romanizedistighfār) is the act of seeking forgiveness of Allah in Islam. This is usually done by saying "I seek the forgiveness of Allah" (Arabic: أَسْتَغْفِرُ ٱللَّٰهَ, romanizedastaghfiru llāha), or "I seek the forgiveness of Allah, my Lord, and turn to him (in repentance)" (Arabic: أَسْتَغْفِرُ ٱللَّٰهَ رَبِّي وَأَتُوبُ إِلَيْهِ, romanizedastaghfiru llāha rabbī wa-atūbu ilayhi).

It is considered one of the essential parts of worship in Islam.