Using echo in bash with variable

Using echo in bash with variable

I want to use the line below to change password.When i put actual values
instead of variables , the command works perfectly.
echo -e "$sshpass\n$sshpass | (passwd --stdin root)"
$sshpass is a variable containing a password
I tried the following to make command work with no luck
echo -e "/$sshpass\n/$sshpass | (passwd --stdin root)"
echo -e "$sshpass\n$sshpass | (passwd --stdin root)"
echo -e "'$sshpass'\n/'$sshpass' | (passwd --stdin root)"
Anyone can help me here