One who buys from a pauper, and similarly, a pauper who was given pieces of bread or chunks of pressed-fig — tithes from each and every one. But with dates and dried figs — he mixes [them] and takes [maaser]. R’ Yehudah said: When is this so? When the dona-tion is large. But when the donation is small, he tithes from each and every one.