Proverbs 30:15; Proverbs 30:18; Proverbs 30:21; Proverbs 30:29

15 The leech has two daughters; "Give, give," they cry. Three things are never satisfied; four never say, "Enough":
18 Three things are too wonderful for me; four I do not understand:
21 Under three things the earth trembles; under four it cannot bear up:
29 Three things are stately in their stride; four are stately in their gait: