Answer:
The lion with the jackal is compared to gentle eyelids.
Explanation:
These lines come from Serenity a poem made into a song by Dusan Bogdanovic, where he describes the peacefulness of a person's gentle eyelids, the lines that go before the reference to the lion with the jackal help to have a clearer idea "as gentle as your eyelids, the lion with the jackal." This is part of a series of poems turned into songs.
