ANSWER:

What you had done is not permissible as water was available and you must have waited for your dad to come and made wudu before praying.

Repeat that prayer now as it was invalid!

QUESTION: I went fr outng wth my famly knowng tht thrs a mosq whr ladies prayr area available,but aftr reaching got to know Imam closed only the whole lades area bcz alot of toilet using issue.I hv done tyamum & pray outside the mosq.Would my Salah accepted or I should w8 till fathr came out of mosq & he’ll open the car so I get my drinkng watr bottle then pray wth wudu bcz it was Maghrb pryr(time issue)