Do Not Eat Upon the Blood

ויקרא פרק יט, כו לֹא תֹאכְלו עַל -הַדָם (לֹא תְנַחֲשׁו וְלֹא תְעוֹנֵּנו ):

Many interpretations offered in Sanhedrin 63a (plus many other places).

SourceInterpretation of the prohibitionExplanation of the verseSanhedrin 63a
Re’eimOne who eats from an (non-holy) animal before it dies (even if already properly schechted and is going to die)Do not eat with (עם) the blood (the soul is still alive)Sanhedrin 63a
Beer YitzchakEating a Korban before the blood is thrown on the Mizbeach (while still in the basin prior to sprinkling)Do not eat the Korban when next to (אצל) its bloodSanhedrin 63a
RambamNo Mavreh (served to mourners the first meal after the burial) for murderers that are executed by Beis DinDo not eat for because (מפני) of blood (of the one that committed murder)Sanhedrin 63a
ChinuchWarning not to become a Ben Sorer uMoreh (rebellious and gluttonous son)Do not eat in a manner that will lead to (causing a release of) the blood (of one murdered)Sanhedrin 63aBais Din does not eat on the day they kill a murdererDo not eat since (מאחר) (you are causing for another) bloodR’ BachyeBais Din should judge capital cases in the morningDo not eat prior to (judging capital cases) bloodBerachos 10b
Peneach ReyaDo not eat prior to prayingDo not eat prior (קודם) to praying for one’s blood (life)Klausenberger RebbeA Tzadik can see good even in a wicked person who appears to have no positive qualities. A judge on a capital case must fast till they find a way to exonerate a murderer. Rabbi Tarfon & Rabbi Akiva said, “If we were in the Sanhedrin, no one would ever have been killed.”ChizkuniDo not eat on the grave of an executed personMishneh Berurah O.C. 526Do not eat a set meal prior to praying.Minchas BelulahDo not overeat.Ramban, Ralbag, MalbimDo not eat blood since is involved with witchcraft or divining practices.R’ Levi from MezeritchThe main part of one’s life is in the blood. Therefore, the main portion of the name of man is the word for blood דם. Thus, when one prays before the Unique One “א ” of the world, He adds an alef to his name to become אדם. But if does not pray to HaShem, then one remains only blood.Do not eat while you are still called Dam until you pray when you can be AdamChassidusEating during the week is the service of birur; prayer reveals the G-dly soul enabling the proper service of birur.Do not perform service of eating until one prays, revealing the G-dly soul