Leviticus 2:5

2:5 If your offering is a grain offering made on the griddle, it must be choice wheat flour mixed with olive oil, unleavened.

Leviticus 2:11

Additional Grain Offering Regulations

2:11 “‘No grain offering which you present to the Lord can be made with yeast, ¹  for you must not offer up in smoke any yeast or honey as a gift to the Lord. ² 

[2:11]  ¹ tn Heb “Every grain offering which you offer to the Lord must not be made leavened.” The noun “leaven” is traditional in English versions (cf. KJV, ASV, NASB, NRSV), but “yeast” is more commonly used today.

[2:11]  ² tc A few Hebrew mss, Smr, LXX, and Tg. Ps.-J. have the verb “present” rather than “offer up in smoke,” but the MT is clearly correct. One could indeed present leavened and honey sweetened offerings as first fruit offerings, which were not burned on the altar (see v. 12 and the note there), but they could not be offered up in fire on the altar. Cf. the TEV’s ambiguous “you must never use yeast or honey in food offered to the Lord.”