'Thread' in the Bible

{that neither a thread nor} a thong of a sandal would I take from all that [belongs] to you, that you might not say, 'I made Abram rich.'

And it happened [that] at her labor one [child] put out a hand. And the midwife took [it] and tied a crimson thread on his hand saying, "This [one] came out first."

And afterward his brother who [had] the crimson thread on his hand came out. And his name was called Zerah.