Abdullah bin lahya'a bin 'Uqba عبد الله بن لهيعة بن عقبة الحضرمي · The Book on Marriage

"Umar bin Al-Khattab said: 'Do not exaggerate in the dowries of women. If doing so was honorable in the world or Taqwa before Allah then Allah's Prophet would have been the first of you to do it. I do not know of the Messenger of Allah marrying any of his women, nor giving any of his daughters in marriage, for more than twelve Uqiyah."

"The Messenger of Allah prohibited that a woman be married along with her paternal aunt, or the paternal aunt along with her brother's daughter, or a woman with her maternal aunt, or the maternal aunt along with her sister's daughter, and the younger is not to be married with the older, nor the older with the younger."