For the LORD hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath he covered.

Wesley's Notes

29:10 Dead sleep - Hardness of heart, and insensibleness of your danger. Seers - Your magistrates and ministers. Covered - With the veil of ignorance and stupidity.

King James Translators' Notes

rulers: Heb. heads

Jamieson-Fausset-Brown Bible Commentary

10. Jehovah gives them up judicially to their own hardness of heart (compare Zec 14:13). Quoted by Paul, with variations from the Septuagint, Ro 11:8. See Isa 6:10; Ps 69:23.

eyes; the prophets, &c.-rather, "hath closed your eyes, the prophets; and your heads (Margin; see also Isa 3:2), the seers, He hath covered." The Orientals cover the head to sleep; thus "covered" is parallel to "closed your eyes" (Jud 4:19). Covering the face was also preparatory to execution (Es 7:8). This cannot apply to the time when Isaiah himself prophesied, but to subsequent times.

Matthew Henry's Concise Commentary

29:9-16 The security of sinners in sinful ways, is cause for lamentation and wonder. The learned men, through prejudice, said that the Divine prophecies were obscure; and the poor urged their want of learning. The Bible is a sealed book to every man, learned or unlearned, till he begins to study it with a simple heart and a teachable spirit, that he may thence learn the truth and the will of God. To worship God, is to approach him. And if the heart be full of his love and fear, out of the abundance of it the mouth will speak; but there are many whose religion is lip-labour only. When they pretend to be speaking to God, they are thinking of a thousand foolish things. They worship the God of Israel according to their own devices. Numbers are only formal in worship. And their religion is only to comply with custom, and to serve their own interest. But the wanderings of mind, and defects in devotion, which are the believer's burden, are very different from the withdrawing of the heart from God, so severely blamed. And those who make religion no more than a pretence, to serve a turn, deceive themselves. And as those that quarrel with God, so those that think to conceal themselves from him, in effect charge him with folly. But all their perverse conduct shall be entirely done away.