Musannaf Ibn Abi Shaybah

Hazrat Nafi’ bin Jubair narrates that Hazrat Ka’b asked Hazrat Abdullah bin Amr (may Allah be pleased with him): “Do you take bad omens?” He replied: “Yes!” He asked: “What supplication do you recite?” Ibn Umar (may Allah be pleased with them both) replied: “O Allah! There is no bad omen except from You, and there is no goodness except from You, and there is no sustainer except You.” Upon this, Hazrat Ka’b said: “You are the greatest jurist among the Arabs.”