Linux: how to transfer files and bypass the "jump" server

If we need to transfer files from the server A to the server C, but we need to jump through server B, since we don't have connectivity straight to C, we can use the setup below:

 On server A, put the lines below in the file : .ssh/config:

# MYPROJ

Host C*

ProxyCommand ssh serverB nc -w 43200 %h 22 2> /dev/null

StrictHostKeyChecking=no