وَلَمْ أَكُنْ بِدُعَائِكَ رَبِّ شَقِيًّا
My Lord, I have never been disappointed in calling upon You.
This closes Maryam 19:4. Bodily frailty is followed by an appeal to the speaker’s past experience of divine generosity. The order combines acknowledged need with hope founded on prior response.
Shāqiyyan should be understood in relation to bi-duʿāʾika: not left unsuccessful or disappointed in supplication. Disregarding the prepositional phrase would flatten the intended meaning.