Numbers 20:23
And the Lord spake unto Moses and Aaron in mount Hor, by the coast of the land of Edom, saying,
Cross-reference
Numbers 21:4
Historical context
Numbers 21:4 continues the journey from mount Hor, where this verse places the LORD's speech — a direct chronological connection.
Numbers 33:37
Historical context
Numbers 33:37 lists mount Hor as a stop in the wilderness itinerary, confirming the location where this verse takes place.
Deuteronomy 10:6
Contrast
Deuteronomy 10:6 places Aaron's death at Mosera instead of mount Hor — a parallel account with a different location.