Most of the 'ulama' of the Sunni community stipulate that if...
Most of the 'ulama' of the Sunni community stipulate that if a husband says three times to his wife that he has divorced her, it will be considered as an irrevocable talaq; resumption of conjugal relations is only possible if the wife marries and subsequently divorces another man, though it is clearly stated in certain of their accepted hadith that divorce pronounced three times in one sitting is to be counted as one divorce.
It is narrated in al-Bukhari, on the authority of Ibn 'Abbas, that "during the time of the Prophet, and during the caliphate of Abu Bakr, and for two years during the caliphate of 'Umar, the 'three divorces' meant only one divorce, but Hadrat 'Umar said: that although people were entitled to delay divorce, they did not wish to wait, and so, seeing no obstacle in the way, we granted permission for them to carry it out" (that is, he recognized the validity of irrevocable divorce after pronouncing divorce three times in one sitting).
The Holy Quran is itself unambigious in this matter: "Divorce (shall be lawful) only twice, then (you should) either keep her in fairness or send her away with kindness." (2:229) After this, God, the Almighty, says: "So if he divorces her (for a third time), then she shall not be lawful to him until she weds another husband." (2:230) We have tried to give a brief account of the causes of divorce; if more details are required, one may refer to the books of Islamic jurisprudence..
There are also other causes of separation such as defects and diseases in either party. If the man is sexually impotent or becomes insane, the woman has the right to divorce him. Certain diseases of a woman's sexual organs entitle the man to divorce his wife. Zihar and illa' (kinds of oaths of rejection of the woman on the part of the man, common amongst the Arabs before the coming of Islam) may also be a cause of separation.
The various kinds of "iddah" and other allied matters are dealt with comprehensively in more specialized works of fiqh. Suffice it to say that after the death of the husband, it is compulsory for the wife to observe "iddah" even if she is "ya'isah" (past the menopause), or is a minor, or has not had coition with her husband. In divorce, "iddah" is compulsory in cases other than the three mentioned above. In unlawful coition (adultery), there is no 'iddah.
The necessary waiting period after the death of the husband is four months and ten days, but, in case the woman is pregnant, she must wait until delivery.