Which poem in The Book of Songs does the word Water Margin come from?

From "Poetry, Elegance and Encouragement", the original poem:

Gu Gongqifu, come to the DPRK to get the horse. The rate of west water margin, as for ambiguity. Shen and Jiang Nv, Yu Yu.

The "water margin" here is not Liangshan water margin, but the meaning of waterfront and waterside.

Translation:

One morning, Duke Zhou rode his horse to the foot of Qishan, along the western waterfront. And his wife Jiang, looking for a place to relocate.