By Ibn Kathir. Allah the Almighty declared : Remember Ishmael and Idris and Dhul Kifl, all were from among those who observe patience. (Ch 21:85-86 Quran).
Allah directed: Remember Our slaves, Abraham, Isaac, and Jacob (all) owners of strength (in worshipping Us) and also of religious understanding. Verily, We did choose them by granting them (a good thing ) the remembrance of the home (in the Hereafter and they used to make the people remember it and also they used to invite the people to obey Allah and to do good deeds for the Hereafter). And they are in Our Sight, verily of the chosen and the best! Remember Ishmael, Elisha, and Dhul Kifl all are among the best. (Ch 38:45-48 Quran).
Ibn Jarir narrated that he was not a prophet but he was a righteous man. He supported his people to suffice their needs and administrated justice among them. That is why he was called Dhul Kifl. (means possessor of, or giving, a double requital or portion)