They were as fed horses in the morning: every one neighed after his neighbour's wife. After his neighbor's wife - This may have been literally true, as the abominations of idolatry, in which they were so deeply practiced, would necessarily produce such a state of things as that here mentioned.
Related Commentaries of Jeremiah 5:8
Jeremiah 5:8
8 They were as fed horses in the morning: every one neighed after his neighbour's wife.