Kapłańska 4:28 Midrasz: Sifra

1 (Vayikra 4:28): "If his sin becomes known to him (wherein he sinned"): And not if others tell him. I might think even if he does not refute (them); it is, therefore, written (to negate this): "if it becomes known."

2) R. Elazar b. R. Shimon and R. Shimon b. R. Yehudah said in the name of R. Shimon: He is liable for only one, it being written "for his unwitting sin wherein he sinned unwittingly." "For he did not know (of the 'possibility' having come before him)" — to exclude his being informed by others. I might think (that he is not liable) even though he does not deny (their words); it is, therefore, written "For he did not know, and it will be forgiven him" — but if he does know, it will not be forgiven him.

4) I might think that he does not fulfill his obligation with his father's offering, even with monies that his father separated, and even from the lesser to the lesser or the greater to the greater — but that he does fulfill it with an offering that he separated for himself, even from the greater to the lesser or the lesser to the greater. It is, therefore, written: (Vayikra 4:28): "his offering … for his sin" — It must be (separated) for that sin.