这种做法是源自于，旧约经文中所提到的使用炉灰与衰老或死亡(创世纪18.27)，悲伤或哀悼(以斯帖记4.3)，和忏悔(约拿书3.6)的连结。

This practice derived from Old Testament passages that mention the use of ashes in connection with frailty or death (Genesis 18.27), sadness or mourning (Esther 4.3), and repentance (Jonah 3.6).

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旧约先知曾说:“凡有血气的，尽都如草”。这是基督教新派的重要经文。

The Old Testament prophet had said, "All flesh is grass." It is an important verse for the new dispensation of Christianity.

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