First, there is no original file in the case of hard links; all hard links are equal.
 However, hard links aren’t involved here., as indicated by the link count of 1 in ls -l’s output:
$ ll -i /usr/bin/bash /bin/bash 1310813 -rwxr-xr-x 1 root root 1183448 Jun 18 21:14 /bin/bash* 1310813 -rwxr-xr-x 1 root root 1183448 Jun 18 21:14 /usr/bin/bash*
 Your problem arises because of a symlink, the bin symlink which points to usr/bin. To find all the paths in which bash is available, you need to tell find to follow symlinks, using the -L option:
$ find -L / -xdev -samefile /usr/bin/bash 2>/dev/null
/usr/bin/rbash
/usr/bin/bash
/bin/rbash
/bin/bash
 I’m using -xdev here because I know your system is installed on a single file system; this avoids descending into /dev, /proc, /run, /sys etc.