The ruling on one who made a vow and did not fulfill it in its time

Question:
What is the ruling on one who made a vow and did not fulfill it in the time he specified? Is it permissible for him to perform it at a later time?

Answer:
If he says, "It is obligatory upon me for Allah to pray two rak'ahs in the morning of Thursday," or "in the morning of Friday," and he does not do so, he must pray and expiate with the expiation of an oath for wasting the time. This is one of the opinions of the scholars: he expiates with the expiation of an oath for wasting the time. This is based on the saying of the Prophet (peace and blessings be upon him) in what Muslim narrated from the hadith of 'Uqbah ibn 'Amir: , al-Tirmidhi added: . They said: He named it, but he neglected it, so he owes the expiation of an oath, along with performing the prayer at another time.
Others said: Performing the prayer is sufficient, and he must repent to Allah for that, without an expiation. He must repent to Allah, and it is sufficient for him to perform the prayer. This is based on the saying of the Prophet (peace and blessings be upon him): . So he performs the act of obedience and seeks forgiveness from Allah for the delay that occurred. Likewise, if he vowed to fast on a specific Thursday, then he was negligent, he must fast a day in its place, just as he fasts a day in place of Ramadan, and he must repent.
Others said: He must also perform the expiation of an oath in addition to this, because he neglected the day.