GOD'S WORD® Translation
These are the sons of Reuben, Israel's firstborn. (Although he was the firstborn, his rights as firstborn were given to his nephews, Joseph's sons, because he dishonored his father's bed. However, Joseph couldn't be listed in the genealogy as the firstborn son.

American Standard Version
And the sons of Reuben the first-born of Israel (for he was the first-born; but, forasmuch as he defiled his father's couch, his birthright was given unto the sons of Joseph the son of Israel; and the genealogy is not to be reckoned after the birthright.

Berean Study Bible
These were the sons of Reuben the firstborn of Israel. Though he was the firstborn, his birthright was given to the sons of Joseph son of Israel, because Reuben defiled his father’s bed. So he is not reckoned according to birthright.

Douay-Rheims Bible
Now the sons of Ruben the firstborn of Israel, (for he was his firstborn: but forasmuch as he defiled his father's bed, his first birthright was given to the sons of Joseph the son of Israel, and he was not accounted for the firstborn.

English Revised Version
And the sons of Reuben the firstborn of Israel, (for he was the firstborn; but, forasmuch as he defiled his father's couch, his birthright was given unto the sons of Joseph the son of Israel; and the genealogy is not to be reckoned after the birthright.

King James Bible
Now the sons of Reuben the firstborn of Israel, (for he was the firstborn; but, forasmuch as he defiled his father's bed, his birthright was given unto the sons of Joseph the son of Israel: and the genealogy is not to be reckoned after the birthright.

World English Bible
The sons of Reuben the firstborn of Israel (for he was the firstborn; but, because he defiled his father's couch, his birthright was given to the sons of Joseph the son of Israel; and the genealogy is not to be reckoned after the birthright.

Young's Literal Translation
As to sons of Reuben, first-born of Israel -- for he is the first-born, and on account of his profaning the couch of his father hath his birthright been given to the sons of Joseph son of Israel, and he is not to be reckoned by genealogy for the birthright,

1 Chronicles 5:1 Additional Translations ...