Thou shalt not also go into the house of feasting, to sit with them to eat and to drink.

Wesley's Notes

16:8 Go - God did not only forbid his prophet to go into houses of mourning, but forbad him to go into houses, where they were wont to eat and drink upon a more chearful account.

Jamieson-Fausset-Brown Bible Commentary

8. house of feasting-joyous: as distinguished from mourning-feasts. Have no more to do with this people whether in mourning or joyous feasts.

Matthew Henry's Concise Commentary

16:1-9 The prophet must conduct himself as one who expected to see his country ruined very shortly. In the prospect of sad times, he is to abstain from marriage, mourning for the dead, and pleasure. Those who would convince others of the truths of God, must make it appear by their self-denial, that they believe it themselves. Peace, inward and outward, family and public, is wholly the work of God, and from his loving-kindness and mercy. When He takes his peace from any people, distress must follow. There may be times when it is proper to avoid things otherwise our duty; and we should always sit loose to the pleasures and concerns of this life.