Deuteronomy 32:50

Deu. 32:50. "And die in the mount whither thou goest up, and be gathered unto thy people; as Aaron thy brother died in mount Hor, and was gathered unto his people." God ordered that Aaron and Moses should go up to the tops of mountains to die, to signify that the death of godly men is but an entrance into a heavenly state. It is evident that heaven is sometimes typified by the tops of the mount by Hebrews 8:5 compared with 12:22. So Christ was transfigured in the mount, and appeared in glory with both Old-Testament and New-Testament saints, and the glory of God in a cloud, to be a type of the heavenly state. Vide Note on Exodus 24:18. No. 71.