When the Divine Revelation: "For those who can fast, they had a choice either fast, or feed a poor for every day," (2.184) was revealed, it was permissible for one to give a ransom and give up fasting, till the Verse succeeding it was revealed and abrogated it.
• Sahih al-Bukhari, 4507
• Sahih al-Bukhari, Vol. 6, Book of Prophetic Commentary on the Qur'an, Hadith 34
• Sahih al-Bukhari, Book of Prophetic Commentary on the Qur'an, Hadith 34