«سُورَةٌ أَنْزَلْنَاهَا وَفَرَضْنَاهَا»
“A surah We have sent down and made binding.” (al-Nūr 24:1, excerpt)
The opening announces both the surah’s revealed origin and the seriousness of its ordinances. The audience is prepared from the outset to receive the subsequent teaching as authoritative guidance. The word faraḍnāhā heightens that force.
This is not merely a conventional letter heading but a forceful proclamation. Its opening declaration provides an interpretive frame for the commands and moral instructions that follow.