Abu Dawud al-Sijistani (may Allah have mercy on him) mentioned the hadiths of Abu Musa al-Ash'ari, Adi bin Hatim and Abu Hurayrah (may Allah be pleased with them).
The Shaykh said: The hadiths of Abd al-Rahman bin Samurah (may Allah be pleased with him) indicate breaking the oath first and giving the expiation afterwards, and most (of the narrations) are: "Let him give the expiation for the oath and then do the better thing."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأيمان / 19964