Commentary for Chullin 209:21
ולא כלום
The [above] text [stated]: R'Hisda said: If a person ate flesh he is forbidden to eat [after it] cheese, i cheese he is permitted to eat [after it] flesh'.
Rashi on Chullin
It is forbidden to eat cheese - Because meat exudes fat that stays in the mouth and the taste stays in the mouth.
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Tosafot on Chullin
"At the next meal I'll eat": Not just at the meal that is customary - one in the morning and one in the evening - rather even immediately, if you clear the table and make the concluding blessing, it's permissible, since the Rabbi's didn't differentiate.
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