1 Chronicles 16:15
Be ye mindful always of his covenant; the word which he commanded to a thousand generations;
Cross-reference
Deuteronomy 7:9 describes God as faithful to keep covenant and steadfast love to a thousand generations, directly paralleling this verse.
Psalm 105:8 is nearly identical wording, directly quoting this verse about God remembering his covenant forever.
Psalm 111:9 states God commanded his covenant forever, reinforcing the eternal nature of the covenant mentioned here.
Deuteronomy 4:23 warns against forgetting the covenant, while here the call is to remember—opposite sides of the same exhortation.
Psalm 25:10 also links God's paths with keeping covenant and testimonies, echoing the same call to covenant faithfulness.
Psalm 44:17 affirms faithfulness to God's covenant even in suffering, contrasting the praise context here but sharing the covenant theme.