A person may refuse the request of a Katan but he shall not refuse the request of a Gadol.
A Tzadik says little and does a lot and a Rasha says a lot and don't even do a little.
Avraham Avinu did not bring the bread out for the angels because he only ate Chulin if it was Tahor and Sarah became a Nidah that day and the bread became Tamei.
The angels knew where Sarah was but they asked about her in order to endear her to her husband and according to the second opinion it was in order to send her a Kos Shel Berachah.
Shmuel says a person may not ask about the welfare of a woman; however by way of her husband it is permitted.
R. Yishmael says Shalom is so important that even Hakadosh Baruch Hu alters the truth for the purpose of Shalom. (1)
On the day that Yitzchak was weaned Avraham and Sarah made a big Se'udah and all of the nations of the world claimed that Yitzchak was adopted from the street so Avraham and Sarah invited the families of the Gedolei ha'Dor and Sarah nursed the children of all of them.
Until Avraham Avinu no one aged, until Ya'akov no one fell ill and until Elisha no one recovered from an illness.
Elisha fell ill three times, the first illness was a punishment for pushing away Gechazi with two hands, the second time was a punishment for inciting the bears on the children and his third illness was the illness that he eventually succumbed to.
If someone hires workers and he says I will pay you like one of the workers of the city he may pay him like the least of the workers according to R. Yehoshua, while the Chachamim say he must pay him like the medium paid workers.
A worker has the right Min ha'Torah to eat from non-harvested produce if he is working on it at the time of the Gmar Melachah. (2)
If he is working on produce that has already been harvested he may eat from the produce if it is prior to the Gmar Melachah of Ma'aser. (3)
A worker who may eat from the produce but he may not place the produce in his utensil, however if he is working for a non-Jew he may place the produce in his utensil.
It is a Machlokes if Gezel from a non-Jew is permitted.
A person who is working on the produce of Hekdesh may not eat from the produce.
A worker may not suck the juice out of the grapes and throw out the rest.
A worker may not dip the produce in salt while he is eating it so that he will eat a lot.
A worker may eat the produce eat without separating Ma'aser. (4)
A worker may not eat an Achilah Gasah (overeat).
A BIT MORE
1. Sarah said “and my master is old” while Hakadosh Baruch Hu changed her words to I am old.
2. A worker who is picking produce which is the last Melachah that is done with it while it is still attached to the ground may eat from the produce while he is working.
3. If it is produce that is Chayav in Chalah he may eat from the produce prior to the Gmar Melachah of Chalah
4. The worker is not regarded as a purchaser who must separate Ma'aser even if he purchased the produce prior to the Gmar Melachah.
KEMACH OR SOLES
The Pasuk states Kemach (flour) and subsequently it states Soles (fine flour) because a woman is stingy with guests. The Ya'avetz asks Sarah was not the one who said, it was the words of Avraham Avinu. The Ya'avetz answers that Avraham Avinu said Kemach in accordance with the characteristic of Sarah but he subsequently also said Soles in order to give her the choice of using either Kemach or Soles. The Ben Yehoyada answers that Sarah did not have the nature of other women and she was very generous therefore Avraham Avinu said Kemach and Sarah subsequently said Soles. The reason why Avraham Avinu said Kemach because he knew Sarah would say Soles and that would demonstrate that Sarah was generous. The implication is that other women aren't generous with guests because if other women are generous with guest it would not be necessary for Avraham to demonstrate that Sore was generous. The Ben Yehoyada adds that the reason why women are stingy with guests is because women enjoy talking to their husbands and guests take away this enjoyment.
It is forbidden to wish Shalom to a woman at all even by way of a Shali'ach and even by way of her husband. It is forbidden to send her Divrei Shelomim but it is permitted to ask her husband how she is doing. (Shulchan Aruch EH 21:6)
Even if one is not sending her Shalom but is only asking about her welfare it is forbidden to ask with the exception of asking her husband. The reason is because maybe the person who was asked about her welfare will mention it to her and it will endear him to her. (Chelkas Mechokek)