Related על סוכה 4:1

The lulav suspends the Sabbath in the beginning of its duty, and the willow in the end of its duty. There is a story that some Boethusians once hid the willows under some great stones on the Sabbath eve; but when this had become known to the common people they came and dragged them out from under the stones on the Sabbath, for the Boethusians do not acknowledge that the beating of the willow suspends the Sabbath.