Luke 10:8

Taken broadly the food set before the disciples in whatever town they might visit could possibly include ceremonially unclean food. Jesus was already dispensing with the clean unclean distinction in foods (cf. Luke 11:41; Mark 7:19; Romans 10:4). Peter’s scrupulous observance of the Jewish dietary laws may not have characterized all the disciples (cf. Acts 10:14). The practice of eating "unclean" food continued to disturb the early church (cf. 1 Corinthians 8). Undoubtedly Luke included this reference with his original readers in mind.