And in that day shall ye say, Praise the LORD, call upon his name, declare his doings among the people, make mention that his name is exalted. Call upon his name - קראו בשמו kiru bishmo, invoke his name. Make him your Mediator, or call the people in his name. Preach him who is the Root of Jesse, and who stands as an ensign for the nations. Call on the people to believe in him; as in him alone salvation is to be found.
Related Commentaries of Isaiah 12:4
Isaiah 12:4
4 And in that day shall ye say, Praise the LORD, calla upon his name, declare his doings among the people, make mention that his name is exalted.