Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "Jibril came to me. He commanded me to judge by an oath along with a witness, and he said that the day of Wednesday has always been a day of ill omen." [Da'if]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20655