What is the biblical basis for Docetism?

Docetism is the belief that Jesus never took a physical, corporeal form, but He was instead solely spiritual in nature. Passages such as 1 John 2:15 , Galatians 5:17 , and Romans 7:18 could be construed to support their argument, but is there anything in the Bible that Docetists claim(ed) directly implies that Christ was not of flesh? On another note, I'd also like to find documentation of a Docetist actually defending their belief with Scripture. Does anyone know of such a case or where I could find one?