Peace,
Does 9:75-77, is this an unforgivable act that causes a person to be doomed, if they broke an oath with God after getting what they requested?

9:75 And from them are those who pledged to God: "If He gives us from His bounty, then we will believe and we will be among the upright."

9:76 So when He gave them from His bounty, they became stingy with it, and they turned away while they were averse.

9:77 Thus, hypocrisy follows in their hearts until the Day they meet Him; that is for breaking what they promised God, and for what they were lying.