Related על ביצה 4:6

R. Eliezer says: One may take a sliver of wood to pick his teeth with; but the Sages declare it forbidden, But he may take something from the manger located in front of the cattle - only he should not tear it off - in order to poke his teeth with it If he tore it off on the Sabbath, he is obligated to make a sin offering; if he has torn it down on the holiday, he gets the lashes. R. Eliezer says: A scion from the yard, one may gather it up and set it on fire, only he should not intend to pile them up in heaps; R. Shimon declares it permissible, for everything that is in the courtyard is already there.