Do not eat leavened food on the afternoon of the 14th day of Nisan

"You shall not eat leavened bread with it; seven days you shall eat with it unleavened bread, the bread of affliction (for you came out of the land of Egypt in haste), so that you may remember all the days of your life the day when you came out of the land of Egypt.

Hebrew

ג לֹא-תֹאכַל עָלָיו חָמֵץ, שִׁבְעַת יָמִים תֹּאכַל-עָלָיו מַצּוֹת לֶחֶם עֹנִי: כִּי בְחִפָּזוֹן, יָצָאתָ מֵאֶרֶץ מִצְרַיִם--לְמַעַן תִּזְכֹּר אֶת-יוֹם צֵאתְךָ מֵאֶרֶץ מִצְרַיִם, כֹּל יְמֵי חַיֶּיךָ.

Greek

3 οὐ φάγῃ ἐπ᾿ αὐτοῦ ζύμην· ἑπτὰ ἡμέρας φάγῃ ἐπ᾿ αὐτοῦ ἄζυμα, ἄρτον κακώσεως, ὅτι ἐν σπουδῇ ἐξήλθετε ἐξ Αἰγύπτου· ἵνα μνησθῆτε τὴν ἡμέραν τῆς ἐξοδίας ὑμῶν ἐκ γῆς Αἰγύπτου πάσας τὰς ἡμέρας τῆς ζωῆς ὑμῶν.

• Parashah: Re'eh
• Sefer HaChinuch: 485
• Mishneh Torah: Times — Leaven and Unleavened Bread

• Deuteronomy 16:3

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