Hebrews 1:7

Moreover of the angels He says, "He changes His angels into winds, and His ministering servants into a flame of fire."

Hebrews 1:14

Are not all angels spirits that serve Him--whom He sends out to render service for the benefit of those who, before long, will inherit salvation?

Treasury of Scripture Knowledge

Summary

And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire.

Bible References

Who

Hebrews 1:14
Are not all angels spirits that serve Him--whom He sends out to render service for the benefit of those who, before long, will inherit salvation?