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.”