Hadith 8:381
Abu Bakr narrated to us, he said: Ibn Fudayl narrated to us, from Layth, from Mujahid, who said: He was asked about the ‘Umrah after the Hajj, and he said: "It is better than nothing." And ‘Aishah was asked, and she said: "It is according to the amount of the expenditure and the hardship." And ‘Ali was asked, and he said: "It is better than a mustard seed."
حدثنا أبو بكر قال ثنا بن فضيل عن ليث عن مجاهد قال سئل عن العمرة بعد الحج فقال هي خير من لا شيء وسئلت عائشة فقالت على قدر النفقة والمشقة وسئل علي فقال هي خير من مثقال ذرة