Muslims believe that God revealed to Jesus a new scripture, "al-Injīl" (the Gospel), while also declaring the truth of the previous revelations: "al-Tawrat" (the Torah) and "al-Zabur" (the Psalms). The Quran speaks favorably of "al-Injīl", which it describes as a scripture that fills the hearts of its followers with meekness and piety. Traditional Islamic exegesis claiming the biblical message to have been distorted or corrupted ("tahrif"), is termed "ta'yin al-mubham" ("resolution of ambiguity"). This polemic effort has its origins in the medieval period with Abd al-Jabbar ibn Ahmad's writings.