If you fear that you shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if you fear that you shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice.
— Qur'an, Sura 4 (An-Nisa), Ayah 3[1]
so you start out with 2, 3 or 4 and then proceed to have at least 9 wives.
Source?
https://en.m.wikipedia.org/wiki/Polygyny_in_Islam
so you start out with 2, 3 or 4 and then proceed to have at least 9 wives.