What Is The Basis For Saying “Astaghfirullah” After Fardh Prayers?

What is the basis for saying “astaghfirullah” after fardh prayers?

It is sunnah to pray for forgiveness after prayers. Because Prophet Muhammad (saw) would say “astaghfirullah, astaghfirullah al-azim wa atubu ilayh” three times after ending prayer by giving salam, or pray for forgiveness with similar words and say “Allahumma antas salam wa minkas salam …” (Muslim, Masajid, 135; Tirmidhi, Salat, 112).

A person prays for forgiveness due to the deficiencies in his/her prayer by reciting astaghfirullah. In this regard, saying astaghfirullah individually after completing a prayer as an imam or congregation complies with the sunnah.

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS