Musannaf Ibn Abi Shayba 9:1599

Waki’ narrated to us, from Musa ibn Ubaydah, from Abdullah ibn Dinar, from Ibn Umar. And Ubaydah, from Ubaydullah, from Nafi’, from Ibn Umar, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade *al-shighar*.