וְלִ֗י מַה־יָּקְר֣וּ רֵעֶ֣יךָ אֵ֑ל מֶ֥ה עָ֝צְמוּ רָאשֵׁיהֶֽם׃
How weighty also are Thy thoughts unto me, O God! How great is the sum of them!
Rashi on Psalms
And to me, how dear are Your friends The congregation of Israel says, “How esteemed in my eyes are the righteous in every generation!”
Rashi on Psalms
How great is their sum! The calculation of their counting, an expression of (Exod. 30:12): “When you take the sum (ראש) of the children of Israel.”