It is narrated from Amr bin Dinar (may Allah have mercy on him) who states that Ibn Umar (may Allah be pleased with them both) said: "If a person feels drowsy on the day of Jumu'ah while the Imam is delivering the sermon, he should change his place."
Hadith Referenceمسند الإمام الشافعي / كتاب الجمعة / 434
Hadith Takhrijاخرجہ ابن ابی شیبہ، رقم: 5248 ۔ والبیہقی فی المعرفۃ السنن والآثار (1794) ۔ وقال الموقوف اصح وفى الکبری لہ : 338/3 ۔ وقال ”ولا يثبت رفع هذا الحديث والمشهور عن ابن عمر۔“