angels

Do you neglect this great Salvation?

For if the word spoken through angels proved unalterable, and every transgression and disobedience received a just penalty,

how will we escape if we neglect so great a salvation? After it was at the first spoken through the Lord, it was confirmed to us by those who heard,

God also testifying with them, both by signs and wonders and by various miracles and by gifts of the Holy Spirit according to His own will.

Hebrews 2:2-4 (NASB)

Mount Zion

But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, to an innumerable company of angels, to the general assembly and church of the firstborn who are registered in heaven, to God the judge of all, to the spirits of just men made perfect, to Jesus the Mediator of the new covenant, and to the blood of sprinkling that speaks better things than that of Abel.
— Hebrews 12:22-24 (NKJV)