יֵ֭לְכוּ מֵחַ֣יִל אֶל־חָ֑יִל יֵרָאֶ֖ה אֶל־אֱלֹהִ֣ים בְּצִיּֽוֹן׃
Idą od trudu do trudu, aż się ukażą Panu na Cyonie.
Kitzur Shulchan Arukh
People who are meticulous in observing the mitzvos begin to build the sukkah, immediately after the end of Yom Kippur, fulfilling the verse, "They go from strength to strength" (Psalms 84:8).