Sahih al-Bukhari 4505
صحيح البخاري#4505SahihNarrated 'Ata:That he heard Ibn `Abbas reciting the Divine Verse:-- "And for those who can fast they had a choice to either fast, or feed a poor for every day.." (2.184) Ibn `Abbas said, "This Verse is not abrogated, but it is meant for old men and old women who have no strength to fast, so they should feed one poor person for each day of fasting (instead of fasting)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 65:32