For example, the phrase 'mist at the foot of the mountain' from the poem 'Perusing the landscape, there is mist at the foot of the mountain and Minase-gawa River' is used to imply 'Minase-gawa River' without the explicit mentioning of it.
例えば「見わたせば山もと霞む水無瀬川」から「山もと霞む」を流用し、言外に「水無瀬川」を示すなど。