Jasher 2:26

And Lamech was old and advanced in years, and his eyes were dim that he could not see, and Tubal Cain, his son, was leading him and it was one day that Lamech went into the field and Tubal Cain his son was with him, and whilst they were walking in the field, Cain the son of Adam advanced towards them; for Lamech was very old and could not see much, and Tubal Cain his son was very young.