Oracle - Vine's Expository Dictionary of New Testament Words
Oracle[ 1,,G3051, logion ]
a diminutive of logos, a word, narrative, statement," denotes "a Divine response or utterance, an oracle;" it is used of
(a) the contents of the Mosaic Law, Acts 7:38;
(b) all the written utterances of God through OT writers, Romans 3:2;
(c) the substance of Christian doctrine, Hebrews 5:12;
(d) the utterance of God through Christian teachers, 1 Peter 4:11.
Notes: Divine "oracles" were given by means of the breastplate of the high priest, in connection with the service of the tabernacle, and the Sept. uses the associated word logeion in Exodus 28:15, to described the breastplate.