Genesis 29:34

And she conceived again, and bare a son,.... A third time, as soon as she well could after the former birth:

and said, now this time will my husband be joined to me; in greater affection and stronger ties of love, and cleave unto her:

because I have born him three sons; which she considered as a threefold cord, binding his affections to her, which could not be easily broke;

and therefore was his name called Levi; which signifies "joined"; from him the Levites sprung, and had their name.