大般涅槃經義記 2.174

2.174

第八廣明開遮之中，迦葉先請「乞食雜肉，云何得食」；佛教可解。

In the eighth section, extensively explaining exceptions and prohibitions, Kāśyapa first requests: 'If alms-food is mixed with meat, how may one eat it?'; the Buddha's instruction can be understood.