Shrahyl bin Aadah, Abu al-Ash'ath شراحيل بن آدة أبو الأشعث الصنعاني · The Book of Fasting

"We said to Hudhaifah: 'At what time did you take Sahur with the Messenger of Allah?' He said: 'It was daytime, but before the sun had risen." (Daif)

"The Messenger of Allah did not fast in any month of the year more than he did in Shaban. He used to fast all of Shaban."