(As for the direct sources for these setsuwa tales, very similar stories can be found in such works as the "Kojidan" (Tales of the Past), the "Jikkinsho" (Ten Miscellaneous Maxims), and the "Uchigikishu" (Collected Stories I Heard), and over 80 of its stories are duplicated in the "Konjaku monogatari shu.")
（説話の直接の出典には、『古事談』『十訓抄』『打聞集』などに類似の話が見られ、『今昔』との重出話にいたっては80余話もの数にのぼる）。