Musannaf Ibn Abi Shayba 23:197

Ibn Fudayl narrated to us, from ‘Ata’ ibn al-Sa’ib, who said: More than one person narrated to me that a judge from the judges of the people of al-Sham came to ‘Umar ibn al-Khattab and said: "O Commander of the Faithful, I saw a vision that terrified me." ‘Umar said: "What is it?" He said: "I saw the sun and the moon fighting, and the stars were with them, divided into two halves." ‘Umar said: "And with which of them were you?" He said: "With the moon against the sun." ‘Umar said: "‘And We have made the night and the day as two signs, so We erased the sign of the night and made the sign of the day visible.’" He said: "So depart, for by Allah, you shall never work for me in any capacity ever again."