וַיִּקָּחֵ֙הוּ֙ שְׂדֵ֣ה צֹפִ֔ים אֶל־רֹ֖אשׁ הַפִּסְגָּ֑ה וַיִּ֙בֶן֙ שִׁבְעָ֣ה מִזְבְּחֹ֔ת וַיַּ֛עַל פָּ֥ר וָאַ֖יִל בַּמִּזְבֵּֽחַ׃
И он взял его в поле Зофима, на вершину Фасги, и построил семь жертвенников, и возложил тельца и овна на каждом жертвеннике.
Sefer HaBahir
They asked him, "Why is it written, 'He took him [Bilaam] to Sedeh-Tzofim [שדה צופים]' (Numbers 23:14)? What is Sedeh-Tzofim [שדה צופים]? [And] it is written, 'Come my beloved, let us go out to the field [השדה]' (Song of Songs 7:12). What is 'the field'?
[He answered,] "Do not say 'the field,' rather 'the chest [השידה].'"*
[They asked,] "And what is the chest?"
[He replied,] "The Blessed Holy One's heart said to Him. 'Come my beloved, let us go out to the chest [השידה],' to journey and not remain in one place."
[Ed. - manuscripts and commentators read השידה not השירה. The word השידה ordinarily denotes a chest, box, or cabinet, not the anatomical chest.]
[He answered,] "Do not say 'the field,' rather 'the chest [השידה].'"*
[They asked,] "And what is the chest?"
[He replied,] "The Blessed Holy One's heart said to Him. 'Come my beloved, let us go out to the chest [השידה],' to journey and not remain in one place."
[Ed. - manuscripts and commentators read השידה not השירה. The word השידה ordinarily denotes a chest, box, or cabinet, not the anatomical chest.]