When the arrived events as accurately as Fadl had predicted it, al-Ma'mun made him his chief adviser, and his right hand during the civil war with his brother al-Amin.
После того, как предсказания аль-Фадля сбылись, аль-Мамун сделал его своим главным советником и правой рукой во время гражданской войны с братом аль-Амином.