What does the Great Commission have to do with mobile devices? More than you might think.
Holman Illustrated Bible Dictionary
The Zondervan Encyclopedia of the Bible, Volume 2, D–G
The New Interpreter’s Dictionary of the Bible, Volumes 1–5
4. GongGong is the term used in the translation of the phrase chalkos ēchōn (χαλκὸς ἠχῶν), literally “sounding or booming brass” (1 Cor 13:1). It was previously thought to be a musical instrument, but recent research understands this term as an unequivocal reference to a resonating vase made of brass