What are the conditions for a man having more than one wife?

The three conditions

The scholars set out the conditions consistently. IslamWeb (fatwa 7844) states that a man may marry up to four women "provided his financial and physical capacity are present, and provided he does not fear injustice if he combines more than one woman." Shaykh Ibn 'Uthaymeen, in al-Sharh al-Mumti', names them explicitly:

1. Financial capacity

He must have the wealth to pay the dowry and to maintain the wives — housing, food, clothing and support. This is not a matter of luxury; it is the ability to fulfil the rights that marriage itself creates.

2. Physical capacity

He must have the strength and desire to fulfil what is due to each wife. Ibn 'Uthaymeen puts it as having "desire and strength such that he discharges the obligation he owes toward these wives."

3. Justice between the wives

This is the condition the Qur'an itself attaches to the permission. Allah says:

"And if you fear that you will not deal justly with the orphans, then marry those that please you of women, two or three or four. But if you fear that you will not be just, then one..."— Qur'an 4:3

Ibn Kathir comments on this verse that whoever fears injustice should confine himself to one. Ibn al-'Arabi al-Maliki, in Ahkam al-Qur'an, says that if a man has the wealth and the constitution for four, let him do it; if his wealth or his body cannot bear it, let him restrict himself to one.

What "justice" covers

Justice here is the justice a man can control — and the scholars are precise about where it stops.

Ibn 'Uthaymeen explains that love is not a matter of choice, so a man is not obliged to be equal in it; the heart is in Allah's hand. What he can control, he must equalise. He also warns the husband against injustice, citing the Prophet's ﷺ warning:

"Whoever has two wives and inclines to one of them will come on the Day of Resurrection with his side sloping."— Sunan al-Tirmidhi, from Abu Hurayrah

The limit of four, and who may not be combined

No man may hold more than four wives at one time. Al-Tuwayjiri notes that earlier laws allowed more, but the law of Muhammad ﷺ restricted the community to four.

There is also a second restriction, distinct from the number: a man may not combine two women whose kinship would make the union cut ties of blood. The Prophet ﷺ said:

"A woman is not to be combined with her paternal aunt, nor with her maternal aunt."— Sahih al-Bukhari 5109, from Abu Hurayrah

The reason the scholars give is that jealousy between co-wives is intense, and combining close relatives would ignite enmity and sever family ties.

When it becomes recommended or obligatory

The default ruling is permissibility, but it shifts with circumstances. IslamWeb (fatwa 140970) notes that if a man needs more than one wife to remain chaste, he should marry a second, third or fourth. Ibn 'Uthaymeen says plainly that if one wife does not suffice him and does not keep him chaste, "we command him to marry a second, third and fourth." If remaining with one wife would lead him into unlawful relations, polygamy becomes obligatory for him.

Shaykh Ibn Baz goes further: he holds that polygamy is not merely a concession but a virtue and an act of obedience — a means of increasing the Muslim community, guarding chastity, and providing for women who would otherwise remain without a husband.

The wisdom behind it

The scholars give several reasons, and they are worth knowing because they explain why the permission exists at all:

• Guarding chastity — some men are not satisfied by one wife, and the alternative is sin.
• The natural differences between men and women — a woman is prevented from intimacy during menstruation, post-natal bleeding, illness and pregnancy, while a man's capacity remains.
• The greater number of women — especially after wars, women outnumber men, and a woman sharing a husband is better for her than having none.
• Infertility or chronic illness — rather than divorce a wife who cannot bear children or is ill, a man may keep her and marry another.
• Increasing the Muslim nation — the Prophet ﷺ encouraged marrying the loving and fertile.

What is required of the first wife

Ibn Baz and Ibn 'Uthaymeen both address this. A wife should not treat her husband's second marriage as a wrong done to her, provided he fulfils her rights and deals justly. She is called to patience and to seeking reward from Allah, and it is not permitted for her to demand divorce or to harm him in order to force separation when he has fulfilled his obligations. Ibn 'Uthaymeen adds a practical observation: where polygamy is customary in a society, it is easier on the wife; where it is not, it is harder.

Key takeaways

• Three conditions govern polygamy: financial capacity, physical capacity, and justice between the wives — with the limit of four.
• If a man fears he cannot be just, he is restricted to one wife — this is the Qur'an's own condition, not a scholarly addition.
• Justice is required in what a man controls — maintenance, nights, and kind treatment — but not in the love of the heart, which is beyond his power.
• A man may not combine a woman with her paternal or maternal aunt, and may never hold more than four wives at once.
• Polygamy may become obligatory for a man who cannot remain chaste with one wife, and Ibn Baz holds it to be a virtue, not merely a concession.

Further reading

• Ibn Kathir, Tafsir al-Qur'an al-'Azim (on Surah al-Nisa', verse 3)
• Ibn al-'Arabi al-Maliki, Ahkam al-Qur'an
• Ibn 'Uthaymeen, al-Sharh al-Mumti'

And Allah knows best.