John Gill's Bible Commentary Ver. 8. The morsel [which] thou hast eaten, shalt thou vomit up , etc.] It shall turn in thy stomach, thou shall not be able to keep it, when thou understandest thou art not welcome; or thou wilt wish thou hadst never eaten a bit, or that thou couldest vomit up what thou hast; so disagreeable is the thought of being unwelcome, or when this appears to be the case; and lose thy sweet words ; expressed in thankfulness to the master of the feast, in praise of his food, in pleasantry with him, and the other guests at table; all which are repented of when a man finds he is not welcome.
Matthew Henry Commentary
Verses 6-8 - Do not make thyself burdensome to any, especially those not sincere When we are called by God to his feast, and to let our souls deligh themselves, Isa 25:6; 55:2, we may safely partake of the Bread of life.
Original Hebrew פתך6595 אכלת398 תקיאנה6958 ושׁחת7843 דבריך1697 הנעימים׃5273