"None should fast one or two days ahead of the month except, someone who had a prior habit for fasting, in which case let him fast." '
Sunan an-Nasa'i Book 22, Hadith 84
← Previous Hadith "Do not fast ahead of the month, except for a man who habitually fasts, and that day happenes to be one of his regular fasts." '

Sunan an-Nasa'i Book 22, Hadith 83 Next Hadith → "The messenger of Allah said: 'Do not fast one or two days ahead of the month, unless that happens to be a day that one of you habitually fasts."' Abu 'Abdur-Rahman (An-Nasai) said: This is a mistake. '

Sunan an-Nasa'i Book 22, Hadith 85