If a firstborn fell into a pit, R’ Yehudah says: An expert may go down and look [at the blemish]. If [the expert finds that] it has a blemish, he may bring it up and slaughter [it]. But if not, he may not slaughter [it]. R’ Shimon says: In any case where the blemish was not detected before Yom Tov, it is not considered to be prepared.

If an animal died, one may not move it from its place. There was an incident and they asked R’ Tarfon about this matter and about challah which had contracted tumah-contamination. He entered the house of study and asked. They said to him, ‘‘He may not move them from their place.’’