Reference for Chullin 283:13

והיכן טובתו של זה

Now, in the case where a man's father said to him, 'Go up to the top of the building and bring me down some young birds', and he went up to the top of the building, let the dam go and took the young ones, and on his return he fell and was killed-where is this man's length of days, and where is this man's happiness?

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