Sunan an-Nasa'i Book 22, Hadith 85

"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. '

← Previous Hadith "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 Next Hadith → "U never saw the Messenger of Allah fast two consecutive months, but he used to join shaban to Ramadan." '

Sunan an-Nasa'i Book 22, Hadith 86