He vowed to slaughter an animal if his father left the hospital, but when his father left, he refused to let him slaughter it. What is the ruling on the vow?

Question:
And the second. The second, may you live long, what is its name? I have an oath regarding my father. My father was in the hospital, and I told him, "I have vowed that if you come out, I will not slaughter a sacrificial animal for you." When he came out, he said, "No, do not slaughter it for me," meaning, let me be released from it. Well, he says, "O Shaykh, may Allah bless you, he says that he swore an oath, or vowed—no, he swore an oath—that if his father left the hospital, he would have to slaughter a sacrificial animal. But after his father left, his father refused to let him slaughter this sacrificial animal. So what is the ruling?"

Answer:
If it was a vow, yes, if it was a vow, it is obligatory for him to fulfill the vow and slaughter the sacrificial animal, and the father has no right to prevent him, because this is an obligatory vow, a vow of obedience, yes. But if he merely swore an oath and did not make a vow, then he has the choice between slaughtering the sacrificial animal or paying the expiation for an oath, yes.