It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A bad omen is only that which turns you back (from some undertaking) or urges you to press ahead (relying on it)."
Imam Abu Ya'la recorded it. In its chain is a narrator named Ja'far bin al-Zubayr, who is da'if (weak); however, in its meaning it is supported by other authentic hadith.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الطب / 2494
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده صحيح. » «أخرجه مسند أحمد برقم: 1827»