OET interlinear PSA 50:10

uW Translation Notes:

Note 1 topic: grammar-connect-logic-result

כִּי

(Some words not found in UHB: that/for/because/then/when to=me all creature_of,living forest cattle on,hills_of a_thousand )

The word translated as For indicates that what follows is a reason for what came before. Use a connector in your language that makes it clear that what follows is a reason for what came before. Alternate translation: [This is because]

Note 2 topic: figures-of-speech / ellipsis

לִ֥⁠י כָל־חַיְת⁠וֹ־יָ֑עַר בְּ֝הֵמ֗וֹת בְּ⁠הַרְרֵי־אָֽלֶף

to=me all creature_of,living forest (Some words not found in UHB: that/for/because/then/when to=me all creature_of,living forest cattle on,hills_of a_thousand )

Asaph is leaving out some of the words that in many languages a sentence would need in order to be complete. You can supply these words from the context if that would be clearer in your language. Alternate translation: [every beast of the forest is mine, and the cattle on a thousand hills are mine] or [every beast of the forest and the cattle on a thousand hills belong to me]

Note 3 topic: figures-of-speech / idiom

בְּ֝הֵמ֗וֹת בְּ⁠הַרְרֵי־אָֽלֶף

(Some words not found in UHB: that/for/because/then/when to=me all creature_of,living forest cattle on,hills_of a_thousand )

God is using the number a thousand in a way that was common in this culture to mean a very large, uncountable number, not a precise figure. If this phrase does not have that meaning for your readers, you could use a comparable expression from your language that does have that meaning, or you could state the meaning plainly. Alternate translation: [the cattle on every hill] or [all cattle everywhere]