Man was created on the sixth day so that he could not be boastful, since he came after the flea in the order of creation.
人在上帝创世的第六天才被创造出来，所以人们没什么好骄傲的，他们比跳蚤的出世还要靠后。

——Haggadah, Palestinian Talmud
——哈加达