C. F. Keil and Franz Delitzsch on Psalms 25:13

Psa 25:13

The verb לין (לוּן), probably equivalent to ליל (from ליל) signifies to tarry the night, to lodge. Good, i.e., inward and outward prosperity, is like the place where such an one turns in and finds shelter and protection. And in his posterity will be fulfilled what was promised to the patriarchs and to the people delivered from Egypt, viz., possession of the land, or as this promise runs in the New Testament, of the earth, Mat 5:5 (cf. Psa 37:11), Rev 5:10.