Is it permitted to wipe with a pottery shard (cheres) on Shabbat or even on a weekday?

ShabbatHealth Dangers

Synopsis

Wiping with a pottery shard is forbidden even on a weekday due to physical danger — it may tear the rectal ligaments. On Shabbat the prohibition is stronger since using a smooth pottery handle (which poses no danger) is preferred even over a stone.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

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