The “group” that God tells to sing is the congregation. Singing is an act of worship and is to be a corporate experience; an act in which the voice of every man, woman, boy, and girl is lifted up to Yahweh.
So, what is prayer? Prayer is the practice of entering the presence of God! We should and must be there frequently!
I want to read the verse where the Lord COMMANDED mechanical instruments of music in worship; or read of an EXAMPLE of an early NT church using instruments of music in its worship. Where do the scriptures NECESSARILY INFER that the early church ever used instruments of music in its worship?
How beautiful it is to walk in the steps of the Savior; led in paths of light! “Our faith comes from hearing; and hearing through the word of Christ.” (Rom 10:17)