/bin/sh: show: command not found

What is the reason behind the below output ? The device is reachable and ssh is successful from MAC terminal.

ansible R2 -m raw -a “show version” -u keshav -k

R2 | FAILED | rc=127 >>

/bin/sh: show: command not found

non-zero return code

If you ssh to the device and type “show version”, what does it say? The message seems self explanatory?