Musannaf Ibn Abi Shayba 23:198

Shurayh ibn al-Nu‘man narrated to us, he said: ‘Abd al-‘Aziz ibn Abi Salamah narrated to me, from Zayd ibn Aslam, from his father, who said: ‘Umar ibn al-Khattab addressed the people and said: “I saw in my sleep a red rooster that pecked me three times on the place of my waist-wrapper.” Asma’ bint Qays interpreted it, and she said: “If your vision is true, a man from the non-Arabs (Ajam) will kill you.”