وَأَمَّا ٱلسَّآئِلَ فَلَا تَنْهَرْ
Sentence structure
وَأَمَّا introduces the coordinated branch and ٱلسَّآئِلَ is its fronted object. فَلَا تَنْهَرْ is the negative-jussive response.
Ayah summary
And do not rebuke the one who asks, but respond with kindness.
وَأَمَّا — And as for
Grammar: وَ coordinates and أَمَّا introduces the next detailed branch.
ٱلسَّآئِلَ — the petitioner
Grammar: A defined masculine accusative active participle used as fronted object.
فَلَا — then do not
Grammar: فَ introduces the response and لَا forbids, making the verb jussive.
تَنْهَرْ — repel
Grammar: A second-person masculine-singular jussive imperfect with understood subject أَنْتَ.