Psalms 132:13 - Matthew Poole's English Annotations on the Holy Bible

Zion; not strictly, but largely taken; either for the whole mountain, whereof Zion and Moriah were two parts or tops; or for Jerusalem, which was in a great part built upon Mount Zion, whence it is oft called Zion, as hath been noted again and again. For he speaks here of that place which he chose to be his rest for ever, as it follows, Psalms 132:14, which unquestionably was the temple; whence also it appears that this Psalm was not written by David, nor before the building of the temple.