Charles Ellicott Commentary Deuteronomy 33:19

"They shall call the peoples unto the mountain; There shall they offer sacrifices of righteousness: For they shall suck the abundance of the seas, And the hidden treasures of the sand." — Deuteronomy 33:19 (ASV)

They shall call the people to the mountain. —Or, they shall give the mountain-call to the peoples — i.e., they shall call the tribes of Israel to Mount Moriah to offer the sacrifices of righteousness. (See 2 Chronicles 30:11; 2 Chronicles 30:18 for an illustration of this.)