Abu Dawud Book 15, Hadith Number 3266.

Narated By Umar ibn al-Khattab : Sa’id ibn al-Musayyab said: There were two brothers among the Ansar who shared an inheritance. When one of them asked the other for the portion due to him, he replied: If you ask me again for the portion due to you, all my property will be devoted to the decoration of the Ka’bah.

Umar said to him: The Ka’bah does not need your property. Make atonement for your oath and speak to your brother. I heard the Apostle of Allah (PBUH) say: An oath or vow to disobey the Lord, or to break ties of relationship or about something over which one has no control is not binding on you.