peace offerings

from Easton's 1897 Bible Dictionary
Peace offerings
(Heb. shelamim), detailed regulations regarding given in Lev. 3;
7:11-21, 29-34. They were of three kinds, (1) eucharistic or
thanksgiving offerings, expressive of gratitude for blessings
received; (2) in fulfilment of a vow, but expressive also of
thanks for benefits recieved; and (3) free-will offerings,
something spontaneously devoted to God.
    

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