Yet even now, says the Lord, return to me with all your heart, with fasting, with weeping, and with mourning; rend your hearts and not your clothing. Return to the Lord, your God, for he is gracious and merciful, slow to anger, and abounding in steadfast love, and relents from punishing. Who knows whether he will not turn and relent, and leave a blessing behind him, a grain offering and a drink offering for the Lord, your God?
—Joel 2:12-14

He called the twelve and began to send them out two by two, and gave them authority over the unclean spirits. He ordered them to take nothing for their journey except a staff; no bread, no bag, no money in their belts; but to wear sandals and not to put on two tunics. He said to them, “Wherever you enter a house, stay there until you leave the place. If any place will not welcome you and they refuse to hear you, as you leave, shake off the dust that is on your feet as a testimony against them.”
—Mark 6:7-11