一河の流れを汲むも他生の縁
Meanings
1
even chance encounters are fated; today's events are shaped by past lives
A Buddhist-influenced proverb expressing that even the smallest interactions or coincidences are not random but result from karmic connections formed in previous lives. Often used to reflect on the mysterious nature of human relationships.
See also: 一樹の陰一河の流れも他生の縁 (いちじゅのかげいちがのながれもたしょうのえん)
Meeting again by chance on a trip must be what they mean by 'even drawing water from the same river is a bond from a former life.'