13 Heb “Most High.” This divine title (עֶלְיוֹן, ’elyon) pictures God as the exalted ruler of the universe who vindicates the innocent and judges the wicked. See especially Pss 7:17; 9:2; 18:13; 21:7; 47:2.
14 Heb “And I said, ‘This is my wounding, the changing of the right hand of the Most High.’ ” The form חַלּוֹתִי (khallotiy) appears to be a Qal infinitive construct (with a first person singular pronominal suffix) from the verbal root חָלַל (khalal, “to pierce; to wound”). The present translation assumes an emendation to חֲלוֹתִי (khalotiy), a Qal infinitive construct (with a first person singular pronominal suffix) from the verbal root חָלָה (khalah, “be sick, weak”). The form שְׁנוֹת (shénot) is understood as a Qal infinitive construct from שָׁנָה (shanah, “to change”) rather than a plural noun form, “years” (see v. 5). “Right hand” here symbolizes by metonymy God’s power and activity. The psalmist observes that his real problem is theological in nature. His experience suggests that the sovereign Lord has abandoned him and become inactive. However, this goes against the grain of his most cherished beliefs.
15 Heb “yes, I will remember from old your wonders.” The psalmist refuses to allow skepticism to win out. God has revealed himself to his people in tangible, incontrovertible ways in the past and the psalmist vows to remember the historical record as a source of hope for the future.

In other versions

ESVEnglish Standard Version

Then I said, “I will appeal to this,

to the years of the right hand of the Most High.”

I will remember the deeds of the Lord;

yes, I will remember your wonders of old.

I will ponder all your work,

and meditate on your mighty deeds.

NIVNew International Version (2011)

Then I thought, “To this I will appeal:

the years when the Most High stretched out his right hand.

I will remember the deeds of the Lord;

yes, I will remember your miracles of long ago.

I will consider all your works

and meditate on all your mighty deeds.”

CSBChristian Standard Bible

So I say, “I am grieved

that the right hand of the Most High has changed.”

I will remember the Lord’s works;

yes, I will remember your ancient wonders.

I will reflect on all you have done

and meditate on your actions.

NLTNew Living Translation

And I said, “This is my fate;

the Most High has turned his hand against me.”

But then I recall all you have done, O Lord;

I remember your wonderful deeds of long ago.

They are constantly in my thoughts.

I cannot stop thinking about your mighty works.

LEBThe Lexham English Bible

So I said, “This pierces me—

the right hand of the Most High has changed.”

I will remember the deeds of Yah.

Surely I will remember your wonders from long ago.

I will also muse on all your work,

and meditate on your deeds.

KJV 1900King James Version

And I said, This is my infirmity:

But I will remember the years of the right hand of the most High.

I will remember the works of the Lord:

Surely I will remember thy wonders of old.

I will meditate also of all thy work, and talk of thy doings.

Public Domain