C. F. Keil and Franz Delitzsch on Proverbs 15:25

Pro 15:25 25 The house of the proud Jahve rooteth out,      And He establisheth the landmark of the widow.

The power unnamed in יסּחוּ, Pro 2:22 (cf. Pro 14:11), is here named יסּח יהוה (thus to be pointed with Mercha and Pasek following). יצּב is the abbreviated fut. form which the elevated style, e.g., Deu 32:8, uses also as indic. - a syntactical circumstance which renders Hitzig’s correction ויּצּב superfluous. It is the border of the land-possession of the widows, removed by the גּאים (lxx ὑβριστῶν), that is here meant. The possession of land in Israel was secured by severe punishment inflicted in him who removed the “landmark” (Deu 19:14; Deu 27:17), and the Chokma (Pro 22:28; Pro 24:2) as well as the prophets (e.g., Hos 5:10) inculcate the inviolability of the borders of the possession, as the guardian of which Jahve here Himself appears.