Matthew Poole and continuators on Jeremiah 5:8

8 They were as fed horses in the morning: every one neighed after his neighbours wife.

To note the greatness and unruliness of their lust, pampered horses being most wanton like that Deut. 32.15.

It is questioned, whether morning relates to Horses, or to men; if to Horses, then they are compared to Stallions, that having been fed to the full over night, and lain at ease, in the morning they are most lusty, being as we use to say Provender prickt, but rather it seems to relate to Men, shewing that they were very early in going about their filthinesses, Zeph. 3.7. following their uncleanness with as great eagerness, as it is said that drunkards follow strong drink, Isa. 5.11.

i. e. With an impetuous earnestness and unwearied hunting they sought after the Adulteresses to satisfie their beastly lusts. It notes 1. The strength of their lust, a thing in Horses much taken notice of by Authors. 2. The unbridledness and uncontroulableness of it, as is seen in the pampered Horses hunting after the Mare, of which neighing is a sign, thus expressed chap. 13.27. Thus the Grecians would express men extreamly libidinous by the word [non-Latin text not transcribed], and [non-Latin text not transcribed], and that they do [non-Latin text not transcribed], so the LXX and thus described Ezekiel 22.11.