וַיְהִ֞י בִּשְׁתֵּ֧י עֶשְׂרֵ֣ה שָׁנָ֗ה בָּעֲשִׂרִ֛י בַּחֲמִשָּׁ֥ה לַחֹ֖דֶשׁ לְגָלוּתֵ֑נוּ בָּא־אֵלַ֨י הַפָּלִ֧יט מִירוּשָׁלִַ֛ם לֵאמֹ֖ר הֻכְּתָ֥ה הָעִֽיר׃
And it came to pass in the twelfth year of our captivity, in the tenth month, in the fifth day of the month, that one that had escaped out of Jerusalem came unto me, saying: ‘The city is smitten.’
Read halakhic rulings (Jewish law) on Ezekiel 33:21: and classical halakhic sources.