وَأَمَّا السَّائِلَ فَلَا تَنْهَرْ
And as for the petitioner, do not rebuke him. (الضحى: 10)
The second wa-ammā continues a parallel division established by fa-ammā. Both units contain a fronted topic followed by a fā-introduced directive, but they concern different recipients and acts: orphan/oppress versus petitioner/rebuke.
Wāw coordinates another member of the same thematic scheme. The rationale is not merely a pleasant rhyme between words: the subject categories, directives and repeated structure form a meaningful link. Formal parallelism therefore supports rather than replaces semantic analysis.