Strong’s Greek
G31 — aggelia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀγγελία
aggelia — pronounced ang-el-ee'-ah
from 32; an announcement, i.e. (by implication) precept:--message. see GREEK for 32
2 occurrences in the KJV.
1 John 1:5
This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
1 John 3:11
For this is the message that ye heard from the beginning, that we should love one another.