קבלה אויף ישעיהו 26:4

AND GOD SPAKE UNTO MOSES, ETC. R. Abba began his reflections on this portion with the verse: Trust the Lordfor ever (lit. unto Ad), for in KAH TETRAGRAMMATONis fashioning of worlds (lit. rock of ages) (Isa. 26, 4). ‘AII mankind’, he said, ‘should cleave to the Holy One, blessed be He, and put their trust in Him,

Therefore it says, “Trust the Lord unto ‘Ad” (i.e. contemplate the worlds of emanation only as far as the sphere ‘Ad), for beyond that is a hidden region, so transcendent that it passes all understanding, the very source whence the worlds were designed and came into being. Up to this point only is it permissible to contemplate the Godhead, but not beyond, for it is wholly recondite. This is KAH TETRAGRAMMATON, from whence all worlds were fashioned,’

by the two letters JH (KAH) “the Lord designed the worlds”, this world and the world to come. This world was created by the attribute of Justice, and is sustained by the same attribute, in order that humanity should base its life on justice and not depart from the way of righteousness.