וְשַׁבְתֶּ֣ם אֵלַ֔י וּשְׁמַרְתֶּם֙ מִצְוֺתַ֔י וַעֲשִׂיתֶ֖ם אֹתָ֑ם אִם־יִהְיֶ֨ה נִֽדַּחֲכֶ֜ם בִּקְצֵ֤ה הַשָּׁמַ֙יִם֙ מִשָּׁ֣ם אֲקַבְּצֵ֔ם והבואתים [וַהֲבִֽיאוֹתִים֙] אֶל־הַמָּק֔וֹם אֲשֶׁ֣ר בָּחַ֔רְתִּי לְשַׁכֵּ֥ן אֶת־שְׁמִ֖י שָֽׁם׃
but if ye return unto Me, and keep My commandments and do them, though your dispersed were in the uttermost part of the heaven, yet will I gather them from thence, and will bring them unto the place that I have chosen to cause My name to dwell there.
Read halakhic rulings (Jewish law) on Nehemiah 1:9: and classical halakhic sources.