It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Do not marry women for their lineage, for perhaps their lineage may harm them; nor marry them for their wealth, for perhaps their wealth may lead them into transgression. Rather, even a black, slit-nosed slave woman who is religious is better."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13660