bash - SSH connection requests password before password can be sent -

i have odd problem trying ssh connect remote device inside of script can send commands weirdly it's asking password ssh connection before can call expect command. snippet this:

#!/usr/bin/expect set pass="password" echo {$pass} ssh admin@10.3.0.1 -p 4118   #firewall device ip expect { "password: "     {send '$pass\r'} } 

and output this:

password password: 

i have no idea why behaving way.

edit: i've applied changes suggested @glenn jackman, new code being:

    #!/usr/bin/expect     set pass "peak1234"     puts "$pass"     ssh admin@10.3.0.1 -p 4118   #firewall device ip     expect "password :"         send "$pass\r" 

with these changes error:

    set: variable name must begin letter. 

you're confusing expect sh

#!/usr/bin/expect set pass "password"        ; ## no "=" puts $pass                 ; ## no "echo", braces wrong ssh admin@10.3.0.1 -p 4118 expect "password: "  send "$pass\r"             ; ## single quotes have no meaning in expect/tcl