一河の流れを汲むも他生の縁
1
the events of today are destined by the past;even drawing water from the same river reveals a bond from a former life;even chance relationships can be attributed to the working of fate
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)