Jami` at-Tirmidhi 730

Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.

Ishaq bin Mansur informed us: Ibn Abi Maryam informed us: Yahya bin Ayyub narrated to us, from 'Abdullah bin Abi Bakr, from Ibn Shihab, from Salim bin 'Abdullah, from his father, from Hafsah, from the Prophet, who said: ‘Whoever does not resolve to fast before dawn has no fast.’ Abu 'Isa said: We know this report as attributed to the Prophet only through this route. A statement to this effect is also reported from Nafi', from Ibn 'Umar, and that is more authentic. The report is likewise narrated from Az-Zuhri as a statement of a Companion; no one is known to have attributed it to the Prophet except Yahya bin Ayyub. Scholars understand it to mean that a person must intend before dawn for a Ramadan fast, a make-up fast for Ramadan, or a vowed fast; otherwise it is not valid. For a voluntary fast, one may form the intention after dawn. This was the view of Ash-Shafi'i, Ahmad, and Ishaq.