Who had the most kids in the Bible?

Children of Rehoboam

Rehoboam, the son of Solomon and Naamah, had a remarkable number of children. His offspring include Jeush, Shemariah, Zaham, Abijah, Attai, Ziza, and Shelomith, in addition to 21 other sons and 60 daughters. This extensive lineage is part of the House of David.