《笑林广记·腐流部》
于是兄弟俩约定，等到轮换之日，用秤称一下教书先生的体重作为轮换时肥瘦的凭证。
于是兄弟交师于约。师轮至日，即称斤两以为交班肥瘦之验。
So the brothers agreed that when it was time to change, they would use a scale to weigh the teacher's weight as proof of his fat or thinness at the time of the change.
<s>[INST] Translate the following Classical Chinese text into English: 于是兄弟交师于约。师轮至日，即称斤两以为交班肥瘦之验。 [/INST] So the brothers agreed that when it was time to change, they would use a scale to weigh the teacher's weight as proof of his fat or thinness at the time of the change.</s>
Translate the following Classical Chinese text into English: 于是兄弟交师于约。师轮至日，即称斤两以为交班肥瘦之验。
user
So the brothers agreed that when it was time to change, they would use a scale to weigh the teacher's weight as proof of his fat or thinness at the time of the change.
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