Musnad Ahmad 28:472

Rawh narrated to us, Hammad bin Salamah narrated to us, Qatadah informed us, from Abu Thumamah al-Thaqafi, from Abdullah bin Amr bin al-Aas, from the Prophet, peace and blessings be upon him, who said: "The womb (al-rahim) will be placed on the Day of Resurrection. It will have a hook like the hook of a spindle. It will speak with a fluent, eloquent tongue. It will join whoever joined it, and it will sever whoever severed it."