Failed to inject Secrets inside POD environment variables

Hi, I am trying to inject secrets inside POD environment variables.

I followed this doc - Vault Agent Sidecar Injector Examples | Vault by HashiCorp

These are my command arguments -

command: ["/bin/bash"]
args: ["-c", ‘source /vault/secrets/config && sleep infinity’]

You see, for entrypoint script I am using sleep infinity, so when I check the env inside the POD i got no secret,

But note that, when I run this above command inside the POD manually, I can successfully inject the secret inside as POD env variable.