For {i} precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:

(i) They must have one thing often repeated.

Wesley's Notes

28:10 For - They must be taught like little children, because of their great dullness. Line - One line of the book after another, as children are taught to read.

King James Translators' Notes

must be: or, hath been

Matthew Henry's Concise Commentary

28:5-15 The prophet next turns to Judah, whom he calls the residue of his people. Happy are those alone, who glory in the Lord of hosts himself. Hence his people get wisdom and strength for every service and every conflict. But it is only in Christ Jesus that the holy God communicates with sinful man. And whether those that teach are drunk with wine, or intoxicated with false doctrines and notions concerning the kingdom and salvation of the Messiah, they not only err themselves, but lead multitudes astray. All places where such persons have taught are filled with errors. For our instruction in the things of God, it is needful that the same precept and the same line should be often repeated to us, that we may the better understand them. God, by his word, calls us to what is really for our advantage; the service of God is the only true rest for those weary of the service of sin, and there is no refreshment but under the easy yoke of the Lord Jesus. All this had little effect upon the people. Those who will not understand what is plain, but scorn and despise it as mean and trifling, are justly punished. If we are at peace with God, we have, in effect, made a covenant with death; whenever it comes, it cannot do us any real damage, if we are Christ's. But to think of making death our friend, while by sin we are making God our enemy, is absurd. And do not they make lies their refuge who trust in their own righteousness, or to a death-bed repentance? which is a resolution to sin no more, when it is no longer in their power to do so.