One of the most controversial aspects of brit mila is the metzitza ba-peh. As we shall see, the Talmud (Shabbat 133a) mentions metzitza ba-peh, oral suction, as one of the three stages of the ritual circumcision. Following the mila and peria, the mohel places his mouth directly on the wound to draw blood out from the cut. This mishna presents the stages of ritual circumcision — mila, peria and metzitza — and teaches that all three stages are permitted on Shabbat. The Rishonim disagree as to whether one who has already removed the membrane (peria), but not yet performed metzitza, may still continue to cut the skin which is not integral to the brit mila (tzitzin she-einan me’akkevin). May the Compassionate One bless the one who cut the flesh of the foreskin (mila), split the membrane (peria) and drew off the blood of the circumcision (metzitza).

And the judgement of our inclinations and actions (the weightiest and hardest matter that is) we referre it to the idle breath of the vaine voice of the common sort and base raskalitie, which is the mother of ignorance, of injustice and inconstancie.

In the case of pathological hypercoagulative conditions such as thrombosis and embolism, 4-hydroxycoumarin based oral anticoagulants, including warfarin as a well-known example, are administered to block the enzymatic function of VKORC1, effectively diminishing turnover of the vitamin K cycle.

Bunyan has told us […] that in New England his dream was the daily subject of the conversation of thousands.