John Gill Commentary 1 Chronicles 23:22

"And Eleazar died, and had no sons, but daughters only: and their brethren the sons of Kish took them [to wife]." — 1 Chronicles 23:22 (ASV)

And Eleazar died, and had no sons, but daughters

And so none to succeed him in his office and service:

and their brethren the sons of Kish took them ;

married them, their uncle's sons, their own cousins.