"I went out with Abu Qilabah on a journey and he brought some food. I said: 'I am fasting.' He said: 'The Messenger of Allah went out on a journey and brought some food, and said to a man: Come and eat. He said: I am fasting. He said: Allah has waived for the traveler half of the prayer and fasting when traveling, so come and eat. So I came close and ate."'
Sunan an-Nasa'i Book 22, Hadith 193
← Previous Hadith "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."'

Sunan an-Nasa'i Book 22, Hadith 192 Next Hadith → "We were with the Messenger of Allah on a journey, and some of us were fasting and some of us were not. We made a stop on a hot day and looked for shade. Those who were fasting fell to the ground, but those who were not fasting got up and watered the animals. The Messenger of Allah said: 'Those who were not fasting today have taken the reward.""

Sunan an-Nasa'i Book 22, Hadith 194