סֹ֣בּוּ צִ֭יּוֹן וְהַקִּיפ֑וּהָ סִ֝פְר֗וּ מִגְדָּלֶֽיהָ׃
Walk about Zion, and go round about her; Count the towers thereof.
Rashi on Psalms
count Heb. ספרו, an expression of counting. You should know how many towers it requires.
סֹ֣בּוּ צִ֭יּוֹן וְהַקִּיפ֑וּהָ סִ֝פְר֗וּ מִגְדָּלֶֽיהָ׃
Walk about Zion, and go round about her; Count the towers thereof.