The commentary draws on Quranic wording while challenging an overly broad argument from the closeness of sounds.
أَلَمْ أَعْهَدْ
“Did I not take a covenant?”
The point is not to declare Quranic wording defective without proof. Rather, mere closeness of some sounds does not necessarily produce phonetic harshness; a rule asserted without sufficient evidence cannot be applied indiscriminately.
The objection thus targets an inadequate phonetic criterion, not the fasaha of the Quranic expression.