A Very famous verse in Hyakunin-isshu.

Mikanohara
wakitenagaruru
Izumigawa
itsumikitoteka
koishikaruramu

Fujiwara no Kanesuke

Hyakunin-isshu--One hundred Tanka-one hundred celebrated poets

[Izumi-gawa(Izumi river)
: Old name of Kizu-gawa(Kizu river)]