It is narrated from Abu Zubair that he reports from Jabir (may Allah be pleased with him) that they went out while Jabir (may Allah be pleased with him) was bidding them farewell as he was ill. Jabir (may Allah be pleased with him) led the prayer sitting, so they also prayed sitting behind him.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 309
Hadith Takhrijاسنادة ضعيف فان ابا الزبير محمد بن مسلم بن تدرس المكي مدلس قد عنعن أخرجه البيهقي في المعرفة السنن والآثار له : 1471۔