And they are becoming the days of Red-one the back/behind the fathering of him,208 ืืช-Seth eight hundred of a duplication, and he is fathering builders and built-ones.
ืืืจื ืืืืืื behind his fathering, behind the fathering of him.
The word ืืืืืื is an infinitive with the -ื direct object suffix, "the fathering of him." It is also the verbal ending that marks the third-person masculine plural subject "they fathered" (Hiphil causative) but that doesn't fit anywhere in the context.
This form is found almost exclusively with ืืืจื in Genesis 5, and 11. So the two words together are trying to convey a certain meaning. After the fathering of him is overly complicated and unnecessary when a simple verb form could be used. The more mysterious thought provoking sense, Behind the fathering of him lends to the use of the infinitive with the adverb, instead of the more simple "after he fathered him."
Overall, it would seem there are many extra grammatical pieces to the structure that aren't necessary at all if the meaning was intended to be as basic as it has been made out to be.