In Islam, polygamy has the express sanction of the Qur’an, and is, therefore, held to be a divine institution. Vide Suratu ‘n-Nisa, or Chapter iv, 3:—
‘But if ye cannot do justice between orphans, then marry what seems good to you of women, by twos, or threes, or fours: and if ye fear that ye cannot he equitable, then only one, or what your right hand possesses ” (i.e. female slaves)”.
Compare this with the teaching of the Talmud:-
“A man may marry many wives, for Rabba saith it in lawful to do so, if he can provide for them. Nevertheless, the wise men have given good advice, that a man should not marry more than four wives.” (Arbah. Turim. Ev. Hazzer, 1.)
[MARRIAGE, MUT'AH, WIVES, WOMEN.]
Based on Hughes, Dictionary of Islam