Follow the Evidence
Compare two Bible passages and highlight meaningful shared vocabulary.
And he received the sign of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised. So then, he is the father of all who believe but are not circumcised, in order that righteousness might be credited to them.
The blood on the houses where you are staying will be a sign; when I see the blood, I will pass over you. No plague will fall on you to destroy you when I strike the land of Egypt.
sign
Word matching is a discovery aid, not a claim of quotation or dependence.