Torah Temimah cites Kiddushin.
“And he did not know and is guilty and bears his iniquity” — Isi ben Yehudah says: over this all who mourn should mourn.
Homiletic reading of “nasa avono” — the burden of unintended sin.
Even accidental violation leaves a spiritual debt that requires the asham talui. Isi ben Yehudah treats the verse as a cause for mourning: the Torah itself acknowledges that unintended wrongdoing still imposes a weight that must be lifted by the offering.