Musannaf Ibn Abi Shaybah

Hazrat Ata considered it undesirable to unite two paternal cousins (daughters of paternal uncles) in marriage, because this would cause discord between them.

Hazrat Hasan bin Muhammad states that a son of Hazrat Ali (may Allah be pleased with him) married two paternal cousins and both of them were presented to him on the same night.

Hasan absolutely disliked the idea of marrying two paternal cousins together out of fear of severing family ties.

Hazrat Amr narrates that Hazrat Jabir bin Zaid was asked about the ruling for a woman marrying a man who is already married to her paternal cousin. He replied that this is severing of kinship ties, which is not permissible.

Hazrat Isa bin Talha narrates that the Messenger of Allah (peace be upon him) forbade marrying a close relative of a woman who is already married to a man, out of fear of severing family ties.