On Mondays and Thursdays many supplications are added to the standard Tachanun prayer. These additions are not noted in the Talmud, and first appear in Geonic literature. This article traces the development of the Monday/Thursday Tachanun, from its beginnings as a short prayer with multiple options, to its later form as a long prayer with no room for personal choices. The current traditional Monday/Thursday Tachanun is seen to be a collection of many smaller earlier Tachanun prayers.

中文翻译：

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周一和周四扩展的 Tachanun 的开发

在星期一和星期四，许多祈求被添加到标准的 Tachanun 祈祷中。这些增补未在塔木德中注明，而首次出现在吉奥尼文献中。这篇文章追溯了星期一/星期四 Tachanun 的发展，从它最初是一个有多种选择的简短祈祷，到后来的一个没有个人选择余地的长祈祷。当前传统的星期一/星期四 Tachanun 被认为是许多较小的早期 Tachanun 祈祷的集合。