וְאִ֗ישׁ כִּֽי־יִמְכֹּ֤ר בֵּית־מוֹשַׁב֙ עִ֣יר חוֹמָ֔ה וְהָיְתָה֙ גְּאֻלָּת֔וֹ עַד־תֹּ֖ם שְׁנַ֣ת מִמְכָּר֑וֹ יָמִ֖ים תִּהְיֶ֥ה גְאֻלָּתֽוֹ׃
And if a man sell a dwelling-house in a walled city, then he may redeem it within a whole year after it is sold; for a full year shall he have the right of redemption.
Read kabbalistic (mystical) interpretation of Leviticus 25:29: and classical mystical sources.