This phrase marks the beginning of a new part of the story. If your language has a way for doing this, you could consider using it here. (See: [[rc://en/ta/man/translate/writing-newevent]])
Here the phrase "is with you" is an idiom that means God helps or blesses Abraham. AT: "God blesses everything you do" (See: [[rc://en/ta/man/translate/figs-idiom]])
The word "Now" does not mean "at this moment," but is used to draw attention to the important point that follows. AT: "Therefore" (See: [[rc://en/ta/man/translate/figs-explicit]])
This is an idiom meaning to make a solemn oath witnessed by a higher authority, in this instance, God. AT: "promise me with God as your witness" (See: [[rc://en/ta/man/translate/figs-idiom]])
The two men had made a covenant with each other. The abstract noun "faithfulness" can be stated as "faithful" or "loyal." AT: "Be as faithful to me and to the land as I have been to you" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
This can be stated with the understood information. AT: "I swear to be as faithful to you and your people as you have been to me" (See: [[rc://en/ta/man/translate/figs-ellipsis]])