¹⁵ “The leech has two daughters.
    ‘Give! Give!’ they cry.

“There are three things that are never satisfied,^(A)
    four that never say, ‘Enough!’:

¹⁸ “There are three things that are too amazing for me,
    four that I do not understand:

²¹ “Under three things the earth trembles,
    under four it cannot bear up: