וַיַּ֜עַשׂ לֻֽלְאֹ֣ת תְּכֵ֗לֶת עַ֣ל שְׂפַ֤ת הַיְרִיעָה֙ הָֽאֶחָ֔ת מִקָּצָ֖ה בַּמַּחְבָּ֑רֶת כֵּ֤ן עָשָׂה֙ בִּשְׂפַ֣ת הַיְרִיעָ֔ה הַקִּ֣יצוֹנָ֔ה בַּמַּחְבֶּ֖רֶת הַשֵּׁנִֽית׃
And he made loops of blue upon the edge of the one curtain that was outmost in the first set; likewise he made in the edge of the curtain that was outmost in the second set.
Read kabbalistic (mystical) interpretation of Exodus 36:11: and classical mystical sources.