Negative commandment · Lo Ta’aseh #98 of 613
Not to burn as an offering anything which is sweetened or leavened
שלא להקריב שאור או דבש
The verse · Vayikra 2:11
כׇּל־הַמִּנְחָה אֲשֶׁר תַּקְרִיבוּ לַה׳ לֹא תֵעָשֶׂה חָמֵץ כִּי כׇל־שְׂאֹר וְכׇל־דְּבַשׁ לֹא־תַקְטִירוּ מִמֶּנּוּ אִשֶּׁה לַה׳
“No meal offering, which you shall bring to the Lord, shall be made with leaven: for you shall burn no leaven, nor any honey, in any offering of the Lord made by fire.”
The Rambam’s words
Not to burn as an offering anything which is sweetened or leavened, as [Leviticus 2:11] states: "You may not burn anything leavened or sweet [as a fire offering]."
שלא להקריב שאור או דבש, שנאמר (ויקרא ב, יא): "כִּי כָל שְׂאוֹר וְכָל דְבַשׁ, לֹא תַקְטִירוּ".
Why · Sefer HaChinuch #117
To not offer leaven or honey
“The roots of this commandment are very hidden to find even a small hint from them.”
Who & when
“And [it] is practiced at the time of the [Temple] by male priests, as the service is theirs.”
Where in the Mishneh Torah
Hilchot Things Forbidden on the Altar הלכות איסורי המזבח