'Thread' in the Bible

from a thread even unto a shoe-latchet I take not of anything which thou hast, that thou say not, I -- I have made Abram rich;

and it cometh to pass in her bearing, that one giveth out a hand, and the midwife taketh and bindeth on his hand a scarlet thread, saying, 'This hath come out first.'

and afterwards hath his brother come out, on whose hand is the scarlet thread, and he calleth his name Zarah.