Advice about intentionally breaking an Oath

[kamalico]

alsalam alaikum,

I've made two oaths to Allah subhanahu wa tala, the oaths are to donate an amount at an interval and I've been blessed to be able to fulfill it for the past alhamdolellah. I'm very faithful that Allah's assistance through my work will help me reverse the current shortness of funds, I believe he is the razaaq alkarim and I've countless times observed in repentance the answers of my duaa and the Oath is in hamd. Currently my father needs help and I'd like to offer the help but I've allocated my funds towards my periodical sadaqah, the oath is important to me because it is the barakah that Allah has bestowed on me, at the same time my soul calls for helping my father, I'm torn, I don't know if it is my weak nafs, but i almost feel i should sell my car before i think of breaking my oath to Allah, please advice as soon as you can.

Jazakum Allah khair!