62 Heb “for all his regulations [are] before me.” The Hebrew term מִשְׁפָּטִים (mishpatim, “regulations”) refers to God’s covenantal requirements, especially those which the king is responsible to follow (cf. Deut 17:18–20). See also Pss 19:9 (cf. vv. 7–8); 89:30; 147:20 (cf. v. 19), as well as the numerous uses of the term in Ps 119.
63 Heb “and his rules I do not turn aside from me.” 2 Sam 22:23 reads, “and his rules, I do not turn aside from it.” The prefixed verbal form is probably an imperfect; the psalmist here generalizes about his loyalty to God’s commands. The Lord’s “rules” are the stipulations of the covenant which the king was responsible to obey (see Ps 89:31; cf. v. 30 and Deut 17:18–20).
64 Heb “from my sin,” that is, from making it my own in any way. Kept myself from sinning. Leading a blameless life meant that the king would be loyal to God’s covenant, purge the government and society of evil and unjust officials, and reward loyalty to the Lord (see Ps 101).
65 Heb “according to my righteousness.”
66 Heb “according to the purity of my hands before his eyes.” 2 Sam 22:25 reads “according to my purity before his eyes.” The verbal repetition (compare vv. 20 and 24) sets off vv. 20–24 as a distinct sub-unit within the psalm.

In other versions

For all his rules were before me,

and his statutes I did not put away from me.

I was blameless before him,

and I kept myself from my guilt.

So the Lord has rewarded me according to my righteousness,

according to the cleanness of my hands in his sight.

All his laws are before me;

I have not turned away from his decrees.

I have been blameless before him

and have kept myself from sin.

The Lord has rewarded me according to my righteousness,

according to the cleanness of my hands in his sight.

Indeed, I let all his ordinances guide me

and have not disregarded his statutes.

I was blameless toward him

and kept myself from my iniquity.

So the Lord repaid me

according to my righteousness,

according to the cleanness of my hands in his sight.

I have followed all his regulations;

I have never abandoned his decrees.

I am blameless before God;

I have kept myself from sin.

The Lord rewarded me for doing right.

He has seen my innocence.

because all his ordinances are before me,

and his statutes I have not removed from me,

and I was blameless before him,

and I kept myself from my guilt.

Therefore Yahweh has repaid me according to my righteousness,

according to the cleanness of my hands in his sight.

For all his judgments were before me,

And I did not put away his statutes from me.

I was also upright before him,

And I kept myself from mine iniquity.

Therefore hath the Lord recompensed me according to my righteousness,

According to the cleanness of my hands in his eyesight.

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