‘ath said: "Verily, Allah made the fast obligatory upon the Prophet by revealing the following verse. Allah Says (what means): {O you who believed, decreed upon you is fasting as it was decreed upon those before you ... [Quran 2:183] {And upon those who are able [to fast, but with hardship] - a ransom [as subtitute] of feeding a poor person [each day]} [Quran 2:184] At that time, whoever wished to do so would fast and whoever wished not to do so would feed a poor person, and that was sufficient for them. After that again Allah Says (what means): {The month of Ramadan [is that] in which was revealed the Quran, a guidance for the people and clear proofs of guidance and criterion. So whoever sights [the new moon of] the month, let him fast it; and whoever is ill or on a journey - then an equal number of other days} [Quran 2:184] By this verse, fasting was established for those who were resident and healthy. A concession was made for the traveler and the sick, and the feeding of the poor by the elderly who could not fast was [left] confirmed." [Imam Ahmad, Imam Abu Dawood and Imam Al-Bayhaqi]

　　[Imam Al-Bukhari] Imams Ahmad, Ash-Shafi‘ee Sa‘eed Ibn Al-Musayyib and Al-Sha'bi and others declared that one should sincerely repent and seek the forgiveness of Almighty Allah and make up the day later.