In the time of Umar, a child was born to a woman six month after her marriage. When the case came to the notice of Umar he was of the view that it was a prima facie case of adultery and as such the woman should be sentenced to punishment for adultery. Umar referred the case to Ali. No evidence was forthcoming to the effect that the woman had any illicit liaison before marriage. Ali held that the mere fact that the child had been born six months after the marriage would not be a sufficient ground for convicting the woman. Ali pointed out that in the Holy Quran the period from conception to the weaning of the child is laid down at thirty months, and the period of the weaning of the child after birth is given as two years. This means that though under normal circumstances a child is born after nine months, a child may be born after six months under abnormal conditions. The woman was accordingly let off and absolved of the charge of adultery.