Genesis 5:8 (BSB)

So Seth lived a total of 912 years, and then he died.

From Genesis 5. Also in the ESV.

Commentary on Genesis 5:8

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Genesis 5:6-20: We have here all that the Holy Ghost thought fit to leave upon record concerning five of the patriarchs before the flood, Seth, Enos, Cainan, Mahalaleel, and Jared. There is nothing observable concerning any of these particularly, though we have reason to think they were men of eminence, both for prudence and piety, in their day: but in general, I. Observe how largely and expressly their generations are recorded.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Genesis 5:8: And Enos lived ninety years, and begat Cainan. According to the Septuagint a hundred and ninety years; it can hardly be thought but that he had sons or daughters before, but this is only taken notice of for a reason before given. And Enos lived ninety years, and begat Cainan.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Genesis 5:8: And all the days of Seth were nine hundred and twelve years: and he died. (e) The main reason for long life in the first age, was the multiplication of mankind, that according to God's commandment at the beginning the world might be filled with people, who would universally praise him.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Genesis 5:3-32: Gen 5:3-32 As Adam was created in the image of God, so did he beget “in his own likeness, after his image;” that is to say, he transmitted the image of God in which he was created, not in the purity in which it came direct from God, but in the form given to it by his own self-determination, modified and corrupted by sin.