ישעיהו ה:ח פירוש: רש״י ואבן עזרא

Woe to those who join a house to a house Twenty-two instances of אַשְׁרֵי, fortunate, were said in the Book of Psalms concerning those who fulfill [the tenets of] the Torah, and Isaiah said twenty-two times, “הוֹי,” woe, concerning the wicked. Woe An expression of a cry of a sigh concerning the impending retribution.

הוי Oh. The sign for the vocative; or (אוי ═) woe. That join house to house, etc. That move the boundaries of the houses and fields according to their own interest. אין ═ אפס Not.

those who join a house to a house They draw their houses one to the other, thereby taking the land of the weak poor man between the two houses, and so