Either,
1. Double to what is in thee; which it seems not probable that he had confidence either to ask, or to expect. Or rather,
2. Double to what the rest of the sons of the prophets may receive at thy request upon this occasion. He alludes to the double portion of the firstborn, Deuteronomy 21:17. But though Elisha desired no more, yet God gave him more than he desired or expected; and he seems to have had a greater portion of the prophetical and miraculous gifts of God's Spirit than Elijah had.