وَمَا أُنْزِلَ عَلَى الْمَلَكَيْنِ بِبَابِلَ هَارُوتَ وَمَارُوتَ
And what was sent down upon the two angels at Babylon, Harut and Marut. (Al-Baqarah 2:102, relevant wording)
The Qur'anic passage and sound interpretation are the basis for discussion of Harut and Marut. Its context concerns the trial of magic, the testing of people, and an express warning against disbelief. Later dramatic tales about the pair do not automatically carry the same authority as the verse.
Exegetical discussions also examine the reading and interpretation of al-malakayn. A disputed report or reading must not be presented as an undisputed creed without assessing its evidentiary status.