Ibn 'Abbas (RAA) narrated, 'An elderly man is permitted to break his fast, but he must feed a poor person daily, and he does not have to make up for it.' Related by Ad-Daraqutni and Al- hakim, who rendered it to be Sahih (RU)
English reference (RU): Book 5, Hadith 696 (RU)
Arabic reference (RU): Book 5, Hadith 675 (RU)