Abu Umamah (May Allah be pleased with him) reported:
A man sought permission from the Messenger of Allah (ﷺ) to travel in the land. He (ﷺ) said to him, "Travel for my people is Jihad in the Cause of Allah, glory be to Him."[Abu Dawud].
App reference: Book 12, Hadith 61
Arabic/English book reference: Book 12, Hadith 1345