ציטירנדיקער פּירוש אויף תהילים 69:8

שבעת ימים תאכל עליו מצות, “for seven consecutive days shall you eat unleavened bread with it.” In this verse we best translate the word: עליו as “on account of it.” Compare also Psalms 44,23: כי עליך הורגנו כל היום, “for on Your account we are being killed every day;” compare also Psalms 69,8: כי עליב נשאני חרפה, “for on Your account have I been reviled.” In other words: you are to eat unleavened bread on account of the Passover sacrifice which you offer as a memorial of the Exodus from Egypt.

The use of the word: עליו in this sense is also found in Psalms 44,23, עליך, where it clearly means: “for your sake.” The same is true of Psalms 69,8.

עליו “on his account;” this would be parallel to Psalms 44,23: כי עליך הורגנו כל היום, “for it is for Your sake that we are being killed every day.” Compare also: Psalms 69,8: כי עליך נשאתי חרפה, “for I have been reviled for Your sake.”