The Sacred Books and Early Literature of the East…
“ Al Mansur then took his seat on the throne, and Abu Muslim, being introduced, made his salutation, which the Caliph returned. Al Mansur then permitted him to sit, and, having commenced the conversation, proceeded to level sundry reproaches against him. "Thou hast done this," said he, "and thou hast done that." "Why does my lord speak so to me," replied Abu Muslim, "after all my efforts and services?" "Son of a prostitute!" exclaimed Al Mansur,42 "thou owest thy success to our own good fortune. Had a negress slave been in thy place, she would have done as much as thou! ”
