Did Marcion mean a birth in Capernaum (more than a descent)?

[Giuseppe]

I remember somewhere that I had read that Marcion placed the birth of Jesus in Capernaum, and not merely his descent from above already adult.

If someone can help me to remember, I will thank him in advance.

[davidmartin]

Is it Marcion: Portrait of a Heretic Robert I Bradshaw?
https://earlychurch.org.uk/article_marcion.html

"He began at Luke 4:31 "...Jesus came down to Capernaum..." By this his readers were to suppose that He simply appeared from heaven, fully grown"

He he omits J the Baptist
This is less 'docetic' than Mark with the Christ descending at his baptism, was Marcion really a docetic?

[Giuseppe]

Unfortunately there it is reported the usual interpretation (a descent, not a birth).

Where is a birth reported, in connection to Capernaum?