No guest is so welcome in a friend’s house that he will not become a nuisance after three days.

This saying is commonly attributed to the Roman comic playwright Titus Maccius Plautus (c. 254–184 BCE), whose plays frequently satirize everyday social frictions—money, hospitality, and the strains of dependence. In Roman culture, guest-friendship (hospitium) was a valued bond, but it also carried expectations of reciprocity and limits. The “three days” motif reflects a proverbial sense that even warm welcome can sour when a visitor overstays and becomes a burden on household resources and patience. In later European tradition the line often circulates as a classical maxim about tact and the social duty of not imposing, even among intimates.

The remark turns hospitality into a lesson about boundaries. It acknowledges genuine friendship—“no guest is so welcome”—while insisting that affection does not erase practical limits. Time transforms a guest from delight to obligation: the longer the stay, the more the host’s routines, privacy, and resources are disrupted, and the more gratitude can curdle into resentment. The “three days” is less a literal rule than a comic, memorable threshold that warns against entitlement. The quote’s enduring appeal lies in its balanced realism: it defends generosity but also validates the host’s right to comfort and the guest’s responsibility to leave before welcome becomes wearisome.