Hadith.5756 - In the narration of Hamdan ibn Al-Husayn from Al-Husayn ibn Al-Walid from Ibn Bukayr from Abdullah ibn Sinan, he said
"I asked Abu Abdullah (as), 'For what reason is the inheritance for the male equal to the share of two females?'
Imam (as) replied: 'Because Allah (swt) has allocated the dowry (ṣadaq) for her.'"