King James Version (KJV)
For thou hast hid their heart from understanding: therefore shalt thou not exalt them.
Modern English
Since you have closed their hearts to understanding, therefore you will not let them triumph.
Hebrew
כִּֽי לִבָּ֥ם צָפַ֣נְתָּ מִשֶּׂ֑כֶל עַ֝ל כֵּ֗ן לֹ֣א תְרֹמֵֽם׃
kiy libam ṣapanta mishekel ʿal ken loʾ tromem