“They still bear fruit in old age” (Ps. 92:15). Rabbi Yehoshua ben Korḥa said: [The verse refers to] one who produces foolish behavior (nivim). There was an incident involving a man who made a dyetiki (a legal testament) and said: “My son shall not inherit me unless he becomes a fool.” Rabbi Yose son of Rabbi Yehudah went to ask Rabbi Yehoshua ben Korḥa about this case. They peeked in from outside and saw him beating his hands and his feet, with a reed placed in his mouth, and he was being led along by his son. When they saw this, they hid themselves. They entered and asked him about the case. He began to laugh and said to them: “By your lives! The very incident you asked me about has just now happened to me.” He said to them: “From here we learn that when a person has children, it is as though he becomes foolish" [and the man who left a testament meant that his son should not inherit him until he has his own kids]