"As for the thief, both male and female, cut off their hands. It is the reward of their own deeds, an exemplary punishment from Allah. Allah is Mighty, Wise." - Quran 5:38 (read more)

"And he [Muhammad] had their hands and feet cut off. Then he ordered for nails which were heated and passed over their eyes, and whey were left in the Harra (i.e. rocky land in Medina). They asked for water, and nobody provided them with water till they died (Abu Qilaba, a sub-narrator said, 'They committed murder and theft and fought against Allah and His Apostle, and spread evil in the land.')" - Sahih Bukhari 1:3:63 (read more)

"The marriage of a Christian man to a Muslim woman is an invalid marriage. Allah says in the Quran, "And give not [Muslim women] in marriage to idolaters until they believe" (al-Baqara 221). Therefore, it is not allowed for a disbeliever to marry a Muslim woman... If he does marry her, the marriage is invalid. The children are the children of fornication. They are to be given to their mother and ascribed to her alone." - Shaikh ibn Baz