Adam Clarke on Psalms 132:6

Lo, we have heard of it at Ephratah - This may be considered as a continuation of David's vow, as if he had said: As I had determined to build a temple for the ark, and heard that it was at Ephratah, I went and found it in the fields of Jaar, יער; - not the wood, but Kirjath Jaar or Jearim, where the ark was then lodged; - and having found it, he entered the tabernacle, Psa 132:7; and then, adoring that God whose presence was in it, he invited him to arise and come to the place which he had prepared for him.