#Look

The phrase "Look" here draws attention to the surprising information that follows.

#I have undertaken to speak

"I have been so bold to speak to you." AT: "Pardon me for being so bold as to speak to you" or "Excuse me for daring to speak."

#to my Lord

Abraham shows his respect to Yahweh by speaking to Yahweh of Yahweh as if he were speaking of someone else. AT: "to you, my Lord" (See: [[:en:ta:vol2:translate:figs_123person]])

#only dust and ashes

This metaphor describes Abraham as a human being, who will die and whose body will turn into to dust and ashes. AT: "only a mortal man" or "as unimportant as dust and ashes." (See: [[:en:ta:vol1:translate:figs_metaphor]])

#five less than fifty righteous

"only forty-five righteous people"

#for lack of five

"if there are five fewer righteous people"

#I will not destroy it

"I will not destroy Sodom"