The Pharisees took great pride concerning their
Sabbath. They had many odd or strange rules
like not being able to defend themselves on the
sabbath or even comfort the sick; we know that
it was unlawful to pick an ear of corn on the sabbath
also.

No wonder they were angered when Jesus came
on the scene and didn't pay any attention to their
traditions. They sent spies to follow Him every
where and report His actions.