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

15 The leech has two daughters: “Give, give!” There are three things that are never satisfied, four that never say, “Enough!”:
18 Three things are too wonderful for me, four that I can't figure out:
21 At three things the earth trembles, at four it can't bear up:
24 Four things are among the smallest on earth, but they are extremely wise:
29 There are three things that are excellent in their stride, four that are excellent as they walk: