Now the Jewish religious leaders ¹  refused to believe ²  that he had really been blind and had gained his sight until at last they summoned ³  the parents of the man who had become able to see. ⁴ 

Then they summoned ¹  the man who used to be blind ²  a second time and said to him, “Promise before God to tell the truth. ³  We know that this man ⁴  is a sinner.”