The word(s) "blameless" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) And when she heard of their sly talk, she sent to them and prepared for them a cushioned couch (to lie on at the feast) and gave to every one of them a knife and said (to Joseph): Come out unto them! And when they saw him they exalted him and cut their hands, exclaiming: Allah blameless! This is no a human being. This is not other than some gracious angel.

(2) He (the king) (then sent for those women and) said: What happened when ye asked an evil act of Joseph? They answered: Allah blameless! We know no evil of him. Said the wife of the ruler: Now the truth is out. I asked of him an evil act, and he is surely of the truthful.