Muhammad bin Yahya bin Ayoub محمد بن يحيى أبو يحيى القصري المروزي · The Book of Fasting

"The Messenger of Allah said; 'Take Sahur, for in Sahur there is blessing.""

"we had been travelijng for as long as Allah willed, then we came to the Messenger of Allah and he was eating. He said: 'Come and eat.' I said: 'I am fasting.' The Messenger of Allah said: 'I will tell you about fasting. Allah has waived fasting and half of the prayer for the traveler."'

"I was traveling and I came to the Prophet when he was eating and I was fasting. He said: 'Come and eat.' I said: 'I am fasting.' He said: 'Do you know what Allah has waived for the traveler?' he said: 'Do you know what Allah has waived for the traveler?' I said: 'What has Allah waived for the traveler?' He said: 'Fasting and half of the prayer."'