From Leithart.com

"NT Wright suggests that Jesus’ response to the Pharisees’ complaint about his disciples “harvesting” on the Sabbath puts them in the role of Doeg the Edomite, who watched David get showbread from the priests at Nob (end of Mark 2). A student points out that the Edomite theme is still there in the Sabbath incident in Mark 3:1-6: After all the Pharisees go out from the synagogue to plot against Jesus with the Herodians, supporters of the Idumean/Edomite Herod Antipas."