Abu Bakr al-Athram narrates: I said to Abu Abdullah Ahmad bin Hanbal (may Allah have mercy on him): Do you know from Yahya the hadith he narrated from Amrah from Sayyidah Aishah (may Allah be pleased with her) that she said: "Hafsah (may Allah be pleased with her) and I began the day fasting"? He rejected it and said: Who narrated it? I said: Jarir bin Hazim. He said: Jarir's hadiths are (based on) mistaken impressions (wahm).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8368