תּלמוד אויף תהילים 94:8

Moreover it has been taught: On Hol Hamoed: What did they recite on the first day?”Ascribe to the Lord, O divine beings” (Psalms 29:1). On the second day what did they recite? “But to the wicked God says” (Psalms 50:16). On the third day what did they recite? “Who will rise up for me against the evil-doers” (Psalms 94:16)? On the fourth day what did they recite? “Take heed, you most brutish people” (Psalms 94:8). On the fifth day what did they recite? “I relieved his shoulder of the burden” (Psalms 81:7). On the sixth day what did they recite? “All the foundations of the earth are moved” (Psalms 82:8);

And if Shabbat occurred on any of these days”are moved” is to be superseded.