Q) If a man divorces his fourth wife and wants to marry another woman, does he have to wait until the ‘iddah of the divorced woman ends?
A) Praise be to Allaah.
It is haraam for the man who has divorced his fourth wife to marry another until the ‘iddah of the divorced woman has ended.
And Allaah is the Source of strength.
Fataawa al-Lajnah al-Da’imah, 18/11