حديث 711 من موطأ مالك

Yahya related to me from Malik that he had heard the people of
knowledge telling people not to fast on the day in Shaban when there
was doubt (about whether it was Shaban or Ramadan), if they intended
by it the fast of Ramadan . They considered that whoever fasted on
that day without having seen (the new moon) had to make up that day if
it later became clear that it was part of Ramadan. They did not see
any harm in voluntary fasting on that day.


Malik said, "This
is what we do, and what I have seen the people of knowledge in our
city doing."