With the strength of this eating. This was not like the miracle of Moshe, because by him it says 40 days and 40 nights he ate no bread and drank no water, and it doesn't say that he was sustained by eating. But by Eliyahu it says with the strength of eating, meaning the food lingered in his stomach and wasn't processed...
And Rabbi Ḥiyya bar Abba also said that Rabbi Yoḥanan said: Had there been left open a crack so much as the size of small sewing needle in the cave in which Moses and Elijah stood, they would not have been able to endure due to the light, as it is stated: “For no man shall see Me and live” (Exodus 33:20).
This heretic said to him: How do you know this? Rav Sheshet said to him: Royalty on earth is like royalty in the heavens, as it is written:
“And He said: Go forth, and stand upon the mount before the Lord.
And, behold, the Lord passed by, and a great and strong wind rent the mountains, and broke in pieces the rocks before the Lord;
but the Lord was not in the wind;
and after the wind an earthquake;
but the Lord was not in the earthquake;
and after the earthquake a fire;
but the Lord was not in the fire;
and after the fire a still small voice."
Rabbi Yehoshua ben Levi found Elijah the prophet, who was standing at the entrance of the burial cave of Rabbi Shimon ben Yoḥai. Rabbi Yehoshua ben Levi said to him: Will I be privileged to come to the World-to-Come? Elijah said to him: If this Master, the Holy One, Blessed be He, will wish it so. Rabbi Yehoshua ben Levi says: Two I saw, Elijah and me, and the voice of three I heard