Do not follow the whims of your heart or what your eyes see

"It shall be a tassel for you to look at and remember all the commandments of the LORD, so as to do them and not follow after your own heart and your own eyes, after which you played the harlot,

Hebrew

לט וְהָיָה לָכֶם, לְצִיצִת, וּרְאִיתֶם אֹתוֹ וּזְכַרְתֶּם אֶת-כָּל-מִצְו‍ֹת יְהוָה, וַעֲשִׂיתֶם אֹתָם; וְלֹא-תָתוּרוּ אַחֲרֵי לְבַבְכֶם, וְאַחֲרֵי עֵינֵיכֶם, אֲשֶׁר-אַתֶּם זֹנִים, אַחֲרֵיהֶם.

Greek

39 καὶ ἔσται ὑμῖν ἐν τοῖς κρασπέδοις καὶ ὄψεσθε αὐτὰ καὶ μνησθήσεσθε πασῶν τῶν ἐντολῶν κυρίου καὶ ποιήσετε αὐτὰς καὶ οὐ διαστραφήσεσθε ὀπίσω τῶν διανοιῶν ὑμῶν καὶ ὀπίσω τῶν ὀφθαλμῶν ὑμῶν, ἐν οἷς ὑμεῖς ἐκπορνεύετε ὀπίσω αὐτῶν,

• Parashah: Shelach
• Sefer HaChinuch: 387
• Mishneh Torah: Knowledge — Idolatry and Gentile Customs

• Numbers 15:39

Enumeration and classification from BibleData. The Greek is the Septuagint reading of the same verse, carried by the source for comparison.