This is a quotation within a quotation. This can be expressed with an indirect quote. Alternate translation: "When I ask a young woman to let me have a drink of water from her jar" (See: [[rc://en/ta/man/translate/figs-quotesinquotes]] and [[rc://en/ta/man/translate/figs-quotations]])
The abstract noun "faithfulness" can be stated as "been faithful." Alternate translation: "that you have been faithful to the covenant you have with my master Abraham" or "you have been faithful to my master Abraham" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])