וַיַּ֤רְא הָֽאֱלֹהִים֙ אֶֽת־מַ֣עֲשֵׂיהֶ֔ם כִּי־שָׁ֖בוּ מִדַּרְכָּ֣ם הָרָעָ֑ה וַיִּנָּ֣חֶם הָאֱלֹהִ֗ים עַל־הָרָעָ֛ה אֲשֶׁר־דִּבֶּ֥ר לַעֲשׂוֹת־לָהֶ֖ם וְלֹ֥א עָשָֽׂה׃
האָט גאָט געזען זײערע מעשׂים, אַז זײ האָבן זיך אומגעקערט פֿון זײער שלעכטן װעג, און גאָט האָט חרטה געהאַט אױף דעם בײז װאָס ער האָט גערעדט זײ צו טאָן, און ער האָט עס ניט געטאָן.
Mishnah Ta'anit
What is the order [of service] for fast days?They take the ark out to the open space of the city. And they put ashes on the ark and on the head of the Nasi and on the head of the head of the court (av bet. And everyone [else] puts ashes on his own head. The elder among them says in front of them words of admonition, “Brothers, it does not say of the people of Nineveh, ‘And God saw their sackcloth and their fasting,’ but, ‘And God saw their deeds, for they turned from their evil way. (Jonah 3:10)’ And in the prophets it says, ‘And rend your heart and not your garments” (Joel 2:13).