Ibn Shihab reported,

Abdullah bin Abbas and Abu Hurairah disagreed about making up the missed fasts of Ramadan. One of them said that the days may be kept separately, and the other said that they may not be kept separately. I do not know which of the two said that they may be kept separately.

و حدثني عن مالك

عن ابن شهاب

أن عبد الله بن عباس وأبا هريرة اختلفا في قضاء رمضان فقال أحدهما يفرق بينه وقال الآخر لا يفرق بينه لا أدري أيهما قال يفرق بينه