John Gill Commentary Psalms 102:2

"Hide not thy face from me in the day of my distress: Incline thine ear unto me; In the day when I call answer me speedily." — Psalms 102:2 (ASV)

Hide not your face from me in the day when I am in
trouble
Your Shechinah, as the Targum: when God hides his face at any time from his people, it is a trouble to them, and very grievous; but especially when they are in any other trouble besides; it is very afflicting, indeed, when to their outward trouble this is added, which was Job's case, (Job 23:1–3).

incline your ear unto me; condescend, in great grace and goodness, to stoop and bow your ear, and listen to the voice of my supplication:

in the day when I call, answer me speedily; good men are always for speedy answers of prayer; they would have them the day, the hour, the moment they are calling upon God: sometimes answers are returned as soon, (Isaiah 65:24), the case of the psalmist was very distressing, and, as he thought at least, required haste, and therefore requests a speedy answer.