ISB ~ Mark 2 v24

not lawful on the sabbath:Although Deut 23:25 permits the Israelites to pluck and eat standing grain, the Pharisees indict the disciples under the law of Ex 34:21, which forbids harvesting on the Sabbath (Ex 20:8-11; CCC 2168-73). Resolved to discredit him, the Pharisees equate plucking grain with harvesting it.