Isaia 29:13

Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men: The Lord "Jehovah" - For אדני Adonai, sixty-three MSS. of Kennicott's, and many of De Rossi's, and four editions, read יהוה Yehovah, and five MSS. add יהוה.

Kimchi makes some just observations on this verse. The vision, meaning the Divine revelation of all the prophets, is a book or letter that is sealed - is not easily understood. This is delivered to one that is learned - instructed in the law. Read this; and he saith, I cannot, for it is sealed; a full proof that he does not wish to know the contents else he would apply to the prophet to get it explained. See Kimchi on the place.

And their fear toward me is taught by the precept of men "And vain is their fear of me teaching the commandments of men" - I read for ותהי vattehi, ותהו vethohu, with the Septuagint, Matteo 15:9; Marco 8:7; and for מלמדה melummedah, מלמדים melummedim, with the Chaldee.