(Annisa) 4 : 7
لِلرِّجَالِ نَصِيبٌ مِمَّا تَرَكَ الْوَالِدَانِ وَالْأَقْرَبُونَ وَلِلنِّسَاءِ نَصِيبٌ مِمَّا تَرَكَ الْوَالِدَانِ وَالْأَقْرَبُونَ مِمَّا قَلَّ مِنْهُ أَوْ كَثُرَ ۚ نَصِيبًا مَفْرُوضًا
For men have a portion from whatever parents and near relatives leave, and women have a portion from whatever parents and near relatives leave, no matter how small or large it is, a determined portion.
In the ignorant period, there was no right of inheritance for the women from the property. Moreover, women were considered as property for inheritance. Therefore, in Islam, there is a fixed portion for men and women in the property left by the parents and near relatives whether it is small or large.