This response is based on the information provided. We suggest you discuss with your contracting team, program manager and/or legal department as appropriate.
We assume you are asking what clause applies to reference in Block 13 of the SF 30 to justify this contract adjustment. You did not identify why your team is adding the funds which would give the rationale and then an appropriate citation. Without any context, we cannot think of a clause to reference. If the money is for additional work, you could possibly use FAR 52.243-1, paragraph b. If you are adding funds because the original amount was short by $934, it would appear you have a technical anti-deficiency.