"And if you fear that you cannot act equitably towards orphans, then marry such women as seem good to you, two and three and four; but if you fear that you will not do justice (between them), then (marry) only one or what your right hands possess; this is more proper, that you may not deviate from the right course." - Quran 4:3 (read more)

"....The women asked, "O Allah's Apostle! What is deficient in our intelligence and religion?" He said, "Is not the evidence of two women equal to the witness of one man?" They replied in the affirmative. He said, "This is the deficiency in her intelligence. Isn't it true that a woman can neither pray nor fast during her menses?" The women replied in the affirmative. He said, "This is the deficiency in her religion." - Sahih Bukhari 1:6:301 (read more)

"Getting married at an early age is something that is confirmed by the book of Allah, the Sunnah of his Prophet (Sallallahu Alaihi wa Sallam), the consensus of the scholars and the actions of the companions, and the Muslims who came after them... There are many Ahadith which confirm that marriage at an early age was widespread among the companions and no one denied its permissibility. Getting married at an early age was not peculiar to the Prophet (Sallallahu Alaihi wa Sallam) as some people think, but it was general for him and for his Ummah." - Islamweb