Know! when a person prays in the fields, all the flora enters into the prayer, helping him and strengthening his prayer. This is the reason prayer is called SiChah (conversation), the concept of “SiaCh (shrub) of the field” (Genesis 2:5). All the shrubs of the field empower and assist his prayer.

This is the concept of “And Yitzchak went out laSuaCh (to converse) in the field” (ibid. 24:63)—his prayer was with the help and power of the field. All the flora of the field empowered and assisted his prayer, on account of which prayer is called SiChah.

Therefore, the Curse includes the statement: “and the soil will not yield its produce (yevul)” (Deuteronomy 11:17). For all the earth’s produce must empower and assist the prayer. But when this is impeded or delayed, it thus states: “and the soil will not yield its produce.”

Now, even when a person does not pray in the fields, the earth’s produce—i.e., whatever is near the person, such as his food and drink and the like—aids his prayer. But when he is in the field, because he is particularly close to these things, all the flora and all the soil’s yevul (produce) empower his prayer.

And this is YeVUL—the first letters of Vayeitzei Yitzchak Lasuach Basadeh (“And Yitzchak went out to converse in the field”). All the produce of the field prayed together with him.

(This matter is thoroughly explained in Likutey Moharan II, 1:11, “Sound the Shofar at the New Moon”; see there.)