Because the crowd believes Paul and Barnabas to be the Greek gods in human form, and because they want to avoid any kind of judgment, they do their best to honour Paul and Barnabas. A bull was an expensive sacrifice and the wreaths would be worn on the heads of the people who participate in the procession.1
13 Le prêtre de Jupiter, dont le temple était à l'entrée de la ville, amena des taureaux avec des bandelettes vers les portes, et voulait, de même que la foule, offrir un sacrifice.