From the Later Hundred Poem Sequence from the Reign of Former Emperor Horikawa.

たかせぶねのぼるほりえのみづあさみみくさがくれにかはづなくなり

takasebune noboru horie no mizu asami mikusagakure ni kawazu nakunari

Skips Ascend the canal’s Shallow waters; Hidden deep within the grasses, The frogs are singing.

Fujiwara no Akinaka