'Thread' in the Bible

That I will not take from a thread even to a shoelatchet, and that I will not take any thing that is thine, lest thou shouldest say, I have made Abram rich:

And it came to pass, when she travailed, that the one put out his hand: and the midwife took and bound upon his hand a scarlet thread, saying, This came out first.

And afterward came out his brother, that had the scarlet thread upon his hand: and his name was called Zarah.