'Thread' in the Bible

that I will not take a thread or a sandal thong or anything that is yours, for fear you would say, ‘I have made Abram rich.’

Moreover, it took place while she was giving birth, one put out a hand, and the midwife took and tied a scarlet thread on his hand, saying, “This one came out first.”

Afterward his brother came out who had the scarlet thread on his hand; and he was named Zerah.