Isaiah 29:10 - Matthew Poole's English Annotations on the Holy Bible

Hath poured out upon you; which phrase notes the plenty and vehemency of this judgment. The spirit of deep sleep; hardness of heart, and insensibleness of your danger and misery, which God is said to send, because he denies or withdraws his fight and grace, which alone can cure those maladies. The prophets and your rulers, the seers; your magistrates and ministers, whose blindness or stupidity is a great curse and plague to the people. Or, the prophets, even the chief (for the head is oft put for the chief of persons or things, as Exodus 30:23 1 Chronicles 12:18, and elsewhere) of your seers. Hath he covered with the veil of ignorance and stupidity, or as to their eyes, which is understood out of the former clause. And this last clause is and may be rendered thus, The eyes (which may be repeated out of the foregoing clause) of your prophets, and of, or even of, your principal seers, (or, and of your most intelligent rulers,) hath he covered.