Boyd’s Bible Dictionary:
The peace offering of Leviticus 3, as offered with thanksgiving
(Lev. 7:11-15).
Concise Bible Dictionary:
This occurs in the AV only in the margin of Ezekiel 43:27; Ezekiel 45:15,17 and Amos 5:22. The word is shelem, constantly rendered “peace offering,” as it is in the text of these passages.