Could you explain this question to me?

In the sentence:
तत्र बालः नृपायाम् गच्छति
tatra bālaḥ nṛpāyām gacchati
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since "nṛpāyām " is for both the Instrumental and dative dual form of the noun "king", therefor my question is should I translate the sentence into
1. The boy goes there with the two knigs.
or
2 The boy goes there for the two kings.
?
I'm looking forward for your answer.