Proverbs 30:15; Proverbs 30:18; Proverbs 30:21; Proverbs 30:24; Proverbs 30:29

15 The leech has two daughters: Give, Give. Three things are never satisfied; four never say, "Enough!":
18 Three things are beyond me; four I can't understand:
21 The earth trembles under three things; it cannot bear up under four:
24 Four things on earth are small, yet they are extremely wise:
29 Three things are stately in their stride, even four are stately in their walk: