"God would have healed Hezekiah instantly; but special directions were given, “Let them take a lump of figs, and lay it for a plaster upon the boil, and he shall recover.” Isaiah 38:21 . MH 232.1"
"For Isaiah had said, Let them take a lump of figs, and lay it for a plaister upon the boil, and he shall recover."
Ellen White directly references Isaiah 38:21 in this passage.