Narrated Sahl bin Saud:
When the following verses were revealed: 'Eat and drink until the white thread appears to you, distinct from the black thread' and of dawn was not revealed, some people who intended to fast, tied black and white threads to their legs and went on eating till they differentiated between the two. Allah then revealed the words, 'of dawn', and it became clear that meant night and day.
Reference | : Sahih al-Bukhari 1917 |
In-book reference | : Book 30, Hadith 27 |
USC-MSA web (English) reference | : Vol. 3, Book 31, Hadith 141 |
(deprecated numbering scheme) |