Sayyidina Ibn Abbas (RA) reported that a woman came to the Prophet ﷺ and said, “My sister has died with two months successive fasts against her”. He said, “Listen, if she had a debt payable then would you have discharged it?” She said, “Yes!” He said, “The right of Allah is more important to discharge”. [Ahmed3224, Bukhari 1953, Muslim 1148, Abu Dawud 3310, Ibn e Majah 1759]