How to list all users that have grants over a package

Question

I'm looking for some query to list all users that have grants over a package.

For example, user Schema_A has been granted to execute package: B.MyPackage.

I'm querying views or tables like: role_tab_privs, role_sys_privs,sys.dba_sys_privs, dba_role_privs... but I can't find what I'm looking.