New answers tagged vayera
Abarbanel says that Avraham was only praying for Sodom (until Hashem told him that He would excuse the entire place, if there were 50), and he chose 50 since it is a religiously significant number, there being 50 types of intellect (?), 50 years is Yovel, after age 50 the Levi stops serving. After he started at 50 and then tried 45, he continues down to ten ...
I would offer my own answer that from when the things were invented until very recently, it was completely normal to carry a knife as an all purpose tool and/or for eating (as implied by מאכלת). It might be appropriate to ask why the Torah even mentions that Avraham took a knife with him.
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