《太平广记·卷一·神仙一》
也有人说老子的母亲碰巧是在李树下生了老子，老子一出生就能说话，指着李树说： 就用它来作我的姓吧。 
或云，老子之母，适至李树下而生老子，生而能言，指李树曰：以此为我姓。
It is also said that Lao Tzu's mother happened to give birth to him under a Li tree, and that Lao Tzu was able to speak as soon as he was born, pointing to the Li tree and saying, "Let's use it as my surname."