Exodus 23:18-20

Young's Literal Translation

¹⁸ `Thou dost not sacrifice on a fermented thing the blood of My sacrifice, and the fat of My festival doth not remain till morning;

¹⁹ the beginning of the first-fruits of thy ground thou dost bring into the house of Jehovah thy God; thou dost not boil a kid in its mother's milk.

²⁰ `Lo, I am sending a messenger before thee to keep thee in the way, and to bring thee in unto the place which I have prepared;