Rif Shabbat 19a

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19a

{Shabbat 40b continues}
behold there are embankments that return them.

The Sages learnt {in a brayta}: A man may warm himself at a big fire, go out, and have a souse in cold water; providing that he does not have a souse in cold water [first] and then warm himself at the fire, because he warms the water upon him.

The Sages learnt {in a brayta}: A man may heat a cloth on the Sabbath to place it on his stomach, but must not bring a hot water bottle and place it on his stomach on the Sabbath; and this is forbidden even on weekdays, because of its danger.

The Sages learnt {in a brayta}: A man may bring a jug of water and stand it in front of a fire {on Shabbat}; not for it to become warm, but for its coldness to be tempered. Rabbi Yehuda said: A woman may bring a cruse of oil and place it in front of the fire; not for it to boil, but to become lukewarm. Rabban Shimon ben Gamliel said: A woman may smear her hand with oil, warm it at a fire, and massage her infant son without fear.

Rav Yehuda cited Shmuel: Both in the case of oil and water, if the hand shrinks from it {that is, the hand put in it is spontaneously withdrawn}, it is forbidden; if the hand does not shrink from it, it is permitted.

What is the definition of "the hand shrinks from it"?
Rechava said: If an infant's belly is scalded [by it].

Rabbi Yitzchak bar Avdimi said: I once followed Rabbi into the baths, and wished to place a cruse of oil for him in the bath. Whereupon be said to me, Take [some water] in a second vessel and put [the cruse of oil in it]. Three things are inferred from this: [i] Oil is subject to [the prohibition of] boiling; [ii] a second vessel cannot boil; [iii] making it lukewarm is *not* boiling it.
{Our gemara has the girsa: making it lukewarm is boiling it.}

{The Rif cuts out parts of the gemara which make these statements relate - see inside.}
Rabbi Abba cited Rabbi Yochanan {in our gemara: Rabba bar bar Channa citing Rabbi Yochanan}: In all places it is permitted to think {thoughts of Torah} except for in a privy and a bathhouse.

Abaye said: Sacred matters must not be uttered in secular language, while secular matters may be uttered in the Holy language.

And for the purposes of restraining one from transgression, even in the Holy language it is permitted, for Rabbi said to Rabbi Yitzchak bar Avdimi: Take [some water] in a second vessel and put [the cruse of oil in it]. And we also say: Rav Yehuda cited Shmuel: It once happened that a disciple of Rabbi Meir followed him into the baths and wished to swill the ground for him, but he said to him, One may not swill; he wished to annoint for him with oil, and he said to him: One may not annoint.

{Shabbat 41a}
MISHNA:
IF A MILIARUM IS CLEARED [OF ITS] COALS, ONE MAY DRINK FROM IT ON THE SABBATH. BUT AS TO AN ANTIKI, EVEN IF ITS COALS HAVE BEEN CLEARED ONE MAY NOT DRINK FROM IT ON SHABBAT.
{The words ON SHABBAT the Rif has but our Mishna does not.}