《便西拉的字母》（The Alphabet of Ben-Sira），又译本司拉的知识，是中世纪时期一份佚名文献，讲述到《旧约圣经》次经里的《便西拉智训》的作者、希伯来先知便西拉的生平，由受孕、出生、受教育到长大成人。《便西拉的字母》用希伯来语书写，另外还有以亚兰语书写的古版，但内容略有不同。成书时间估计在公元7世纪至11世纪，很可能在10世纪。

在文献中，便西拉以先知耶利米的儿子的身份被带到巴比伦国王尼布甲尼撒二世的面前。尼布甲尼撒二世在法庭上向便西拉揭示四道神谕，并要求便西拉解释这四道神谕的意思。便西拉于是利用了希伯来语的22个字母作开首，讲述了22个故事来回应国王的问题。

The Alphabet of ben Sirach (Alphabetum Siracidis, Othijoth ben Sira) is an anonymous medieval text inspired by the Wisdom of Sirach. It is dated to anywhere between 700 and 1000 CE. It is a compilation of two lists of proverbs, 22 in Aramaic and 22 in Hebrew, both arranged as alphabetic acrostics. Each proverb is followed by an Haggadic commentary. The work has been characterized as satirical, and it contains references to masturbation, incest and flatulence. The text has been translated into Latin, Yiddish, Judeo-Spanish, French and German. A partial English translation appeared in Stern and Mirsky (1998).