Parallel
1 Chronicles 5:1
Swete's Septuagint · Berean Standard Bible
Καὶ υἱοὶ Ῥουβὴν πρωτοτόκου Ἰσραήλ· ὅτι οὗτος ὁ πρωτότοκος, καὶ ἐν τῷ ἀναβῆναι ἐπὶ τὴν κοίτην τοῦ πατρὸς αὐτοῦ ἔδωκεν εὐλογίαν αὐτοῦ τῷ υἱῷ αὐτοῦ Ἰωσὴφ υἱῷ Ἰσραήλ, καὶ οὐκ ἐγενεαλογήθη εἰς πρωτοτοκεῖα,
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.