Doubt Regarding a Conditional Vow

May Allah reward you. This questioner says: I was a student in school, and I had reached the age of legal maturity. I left the exam fearing that I would fail, so I said: "I vow that if I pass the exam, I will fast." I forgot whether I said two months or three, and I do not know whether I said consecutively or not. In fact, I did not pass in the first round, knowing that I intended to pass or fail in the first round. I failed in the first round and took the exam in the second round, where I passed. Please inform me whether I am obligated to fast. May Allah reward you?
Answer: If your intention was for the first round and you did not pass until the second round, then you owe nothing (Muslims are bound by their conditions). However, if you intended to pass in either the first or the second round, then you must fast two months; because you are certain of that. As long as you have doubt between two months or three, you fast two months, and you are not required to fast them consecutively, as long as you do not have certainty regarding the intention of consecutiveness. You fast sixty days, even if they are scattered, but consecutiveness is better and more preferable. However, since you intended to pass in the first round—in the first term—you owe nothing; because the intended outcome did not occur. Yes.
The presenter: May Allah reward you.