Ibn Ezra on the Torah

And if not, I know... For in truth G-d is called Everything because Gd includes everything and everything is included in Him, and the persons are called "a piece" for we are only a part of the creation. This is why He is the only one that is fit to examine the persons' heart and also know the actual persons' actions in a way that is complete and not partial like the human way. Therefore in this same perasha in verse 23 Abraham said to G-d "Will You sweep away the innocent along with the guilty?"... because Abraham could only see a part of the situation and not the whole.

Far be it: [This term refers to] something that is impossible. Some understand the word to be related to 'hollow', i.e. something that is empty.