BT BB 74b(4) :דאית בה תכלתא דש{ר}<ד>יא חוטי לצדיקי לעלמא דאתי‏ : in which is tkheleth that she will spin into threads for the righteous for the world to come
See the entire entry for šdy#2 vb. to spin or twist thread

BT BB 74b(4) :דאית בה תכלתא דש{ר}<ד>יא חוטי לצדיקי לעלמא דאתי‏ : in which is tekhelet-dyed wool which she will spin into threads for the righteous in the world to come
See the entire entry for teḵlā, teḵltā/tḵeltā n.f. purple thread