Reference for Bava Metzia 200:25

שטף נהר זיתיו ונתנם לתוך שדה חבירו זה אומר זיתי גדלו וזה אומר ארצי גדלה יחלוקו:

<b><i>GEMARA</i></b>. How is it meant? If he stipulated, 'Cut [them] down immediately,' then even [if the oil yield is] less than a quarter <i>log</i> [per <i>se'ah</i>], it should belong to the landowner; whilst if he stipulated, 'Cut [them] down whenever you desire,' even when it is a quarter <i>log</i>, it ought to be the purchaser's? — It is necessary to state this only when he made no stipulation: [in which case] when there is less than a quarter <i>log</i>, one is not particular;<span class="x" onmousemove="('comment',' About the benefit derived by the purchaser from his soil. ');">²³</span>

Jastrow