Luke 9 and 10, the sending out of the 12 and the 70 to proclaim the Kingdom of God and to heal those who were ill.
"They were to travel light. That was simply because the man who travels light travels far and fast. The more a man is cluttered up with material things the more he is shackled to one place. God needs a settled ministry; but he also needs those who will abandon earthly things to adventure for him."
~William Barclay, "The Gospel of Luke, Daily Study Bible Series", p. 115