分ㄈㄣfēn久ㄐㄧㄡˇjiǔ必ㄅㄧˋbì合ㄏㄜˊhé，合ㄏㄜˊhé久ㄐㄧㄡˇjiǔ必ㄅㄧˋbì分ㄈㄣfēn

  1. 世事變化無常，分合無定。《三國演義·第一回》：「話說天下大勢，分久必合，合久必分。」

英lit. that which is long divided must unify, and that which is long unified must divide (idiom, from 三國演義[San1 guo2 Yan3 yi4])​, fig. things are constantly changing