Vayikra 5:19

אשם הוא אשם אשם — The first of these similar words is entirely (i. e. both syllables) punctuated with Kametz because it is a noun, whilst the last is punctuated half with Kametz and half with Patach, because it expresses the idea “he has done something” (i. e. it is a verb in the Kal, 3rd person masc. sing, perfect). — And if you say, surely this is a verse that is unnecessary, since it has stated in the previous verse, “he shall bring the ram for a guilt-offering”, then I reply that it has already been expounded in Torath Cohanim as follows; אשם אשם — this repetition is intended to include in the law of אשם תלוי also the אשם שפחה חרופה (the guilt-offering for dishonouring a maid-servant betrothed to another man; cf. Leviticus 19:12), viz., that it must be a ram of the value of two Sela’im. One might think that I include also the guilt-offering brought by a Nazarite (cf. Numbers 6:12) and the guilt-offering brought by a leper (cf. Leviticus 14:12)! Scripture, however, states “הוא” (Sifra, Vayikra Dibbura d'Chovah, Chapter 21 7).

אָשָׁ֖ם ה֑וּא אָשֹׁ֥ם אָשַׁ֖ם לַיהֹוָֽה׃ {פ}

It is a guilt offering: he has certainly trespassed against the Lord.