Jeremiah 8:5

Why then is this people of Jerusalem slidden back by a perpetual backsliding? they hold fast deceit, they refuse to return.

Why then is this people of Jerusalem slidden back by a perpetual backsliding?.... These people fill into sin, and rise not again by repentance; they turn out of the good ways of God and religion, and return not again; they backslide and revolt from the Lord, and they continue in their revolt and rebellion; their backsliding is an everlasting one; there is no hope of their repentance and recovery: it is a vehement and passionate expostulation about the people of the Jews, founded upon the former general observation, showing them to be the worst of all people: it is a common saying, "it is a long lane that has no turning"; but these people, having departed from the Lord, return no more. A very learned man renders the words, "why does Jerusalem turn away this people with an obstinate aversion?" {b} that is, the rulers and governors of Jerusalem, as in Matthew 23:37 or rather thus, "why does a stubborn aversion turn away this people, O Jerusalem?" and so they are an address to the magistrates and inhabitants of Jerusalem.

they hold fast deceit; practise it, and continue in the practice of it, both with God and man:

they refuse to return: to the Lord, to his worship, and to the right ways of holiness and truth, from whence they had erred; see Jeremiah 5:3.

{b} txun hbvm Mlvwry hzh Meh hbbwv ewdm "quare avertit hunc populum Hierosolyma aversione pertinaci? vel quare avertit populum hunc", O Jerusalem, "aversio pertinax?" De Dieu.