Isa 22:11

22:11 old pool. Probably the Gihon Spring, also known as the “upper pool” (7:3; 36:2).

did not look . . . see him. While busying themselves with planning and fortifying Jerusalem, they forgot the Lord.

planned it long ago. God had planned the future of Jerusalem when He determined long before to create it (37:26). No one could change His plan or avert His judgment.