The first occurrence.
To the woman He said, “I will greatly multiply your sorrow and your conception; in sorrow you shall bring forth children; and your desire shall be to your husband, and he shall rule over you.” Gen 3:16
The primitive root.
Strong’s H1121, ben, a concrete noun meaning, “son,” or if plural, “children” (of both genders); from Strong’s H1129 בנה banah, a primitive root meaning, “to build.” The 3-letter root is bet + nun + hey.
bet ב = the house, thus house, household, family, in, within
nun נ ,ן = the seed, thus continue, heir, son
hey ה = the man with upraised arms, thus look, reveal, wonder, worship, breath
The story: During the era of the patriarchs, every year the women of the family made a new tent panel that would be attached to the existing structure, replacing an older, worn tent panel. So over the course of several years the entire tent was renewed. Thus the house (bet) continues (nun) to breathe (hey, i.e. to live). In the same way that the physical structure of the house continues by the addition of new tent panels, the biological family is renewed by the addition of sons.