54:12 wa faj-jarnal arDa ‘Uyuunan faltaqal maau ‘Alaa amrin qad qudir

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And caused springs to gush out from the earth, so that the two waters met totalling a quantity that had been destined.

Yusuf Ali:
And We caused the earth to gush forth with springs, so the waters met (and rose) to the extent decreed.

Pickthal:
And caused the earth to gush forth springs, so that the waters met for a predestined purpose.