وَاخْفِضْ لَهُمَا جَنَاحَ الذُّلِّ
Lower to them the wing of humility.
Humility is described as though it had a wing. The compared image is not named directly; an associated feature, janāḥ, indicates it. This supports an analysis as implicit metaphor (istiʿārah makniyyah).
First show why the literal sense is not intended and what contextual clue redirects interpretation; then determine whether the comparison vehicle itself or only an associated feature appears.