Parallel
1 Chronicles 5:1
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ υἱοὶ Ρουβην πρωτοτόκου Ισραηλ ὅτι οὗτος ὁ πρωτότοκος καὶ ἐν τῷ ἀναβῆναι ἐπὶ τὴν κοίτην τοῦ πατρὸς αὐτοῦ ἔδωκεν εὐλογίαν αὐτοῦ τῷ υἱῷ αὐτοῦ Ιωσηφ υἱῷ Ισραηλ καὶ οὐκ ἐγενεαλογήθη εἰς πρωτοτόκια
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.