集腋成裘jí yè chéng qiú
[many a little makes a mickle;many little drops of water make an ocean;the finest fragments of fox fur,sewn together,will make a robe;every little makes a mickle] 集积许多狐狸的腋毛而成为裘衣。比喻集众资以成一事
他这会就去同人家商量,想趁此机会,捐个知县班,果然一齐应允,也有二百的,也有一百的,也有五十的,居然集腋成裘,立刻到捐局里,填了部照出来。——《官场现形记》