Among the sciences which Ima`m Abu` Ja'far (al-Baqir), peace be on him, presented during his lectures was the exegesis of the Holy Koran. Indeed he devoted a time of his times to it. He discussed all of its affairs. The scholars of exegesis, though they had different opinions and trends, studied under him. Thus, he was the most brilliant explainer in Islam. Among his studies on the Koran are the following: