Yerushalmi Berakhot 8:4 ירושלמי ברכות ח׳:ד׳

MISHNAH: The House of Shammai say, one sweeps the house and after that one washes his hands⁸⁹One sweeps the house if he ate sitting on the floor, or the table if he ate reclining on a couch. The washing of hands here is that after the meal; the problem of the House of Shammai is that spilled water from washing may spoil bits of food still lying around. The rule of the House of Hillel is optional; that of the House of Shammai is obligatory.. But the House of Hillel say, one washes his hands and after that he sweeps the house.

HALAKHAH: What⁹⁰The Babli (52b) and the Tosephta (5:28) speak only about morsels the size of an olive. The Tosephta also includes the reason given here for the House of Shammai in its text. is the reason of the House of Shammai? Because of loss of food. But what is the reason of the House of Hillel? If the waiter is intelligent he removes the leftovers, even less than the volume of an olive; then one may wash his hands and after that sweep the house⁹¹The Babli and the Tosephta are unanimous that morsels smaller than the size of an olive may be deliberately spoiled; only larger morsels count as food and fall under the Biblical prohibition to destroy usable things. A second difference between Yerushalmi and Babli is that the Yerushalmi permits washing first if the waiter is intelligent; in Babli and Tosephta it is required that the waiter be learned..