The Entry of Exception in Oaths and Vows

Question:
And the Shaykh (may Allah have mercy on him) said that al-Mutahhar, or that Allah purify him, stated that if an oath or vow is of the type that incurs expiation, then it is permissible to make an exception in it. So, based on that, is it permissible to make an exception in a vow of obedience or giving charity, or is it not permissible?

Answer:
No, the exception does not apply in that case. The exception applies in oaths and vows. If one says, "if Allah wills," he does not break his oath, because this is an exception. However, it is required that this exception be connected to the wording of the oath without any pause. If he takes a moment and then says, "if Allah wills," it does not benefit him; he must not pause until he makes the exception; it must be connected. So if he says, "By Allah, I will certainly do such and such, if Allah wills," this oath does not take effect; the oath does not take effect because he made an exception in it. Or if he says, "I owe a month of fasting, if Allah wills," this does not bind him because he made an exception in it. And in the hadith: or as it was reported from him (peace and blessings be upon him). So the exception is beneficial in vows and oaths and prevents them from taking effect. Yes.