Diana Gabaldon. Dragonfly in amber. Book 2. Time of battles (№ 427660)

Unwinding the blood-stained handkerchief, I pressed my wounded hand against his arm. our fingers intertwined. The blood was warm and sticky – it hadn't curled between our palms yet.
"Blood from my blood," I whispered.
- ... and flesh from my flesh, he said quietly.
None of us dared to ubody the last words of the oath: "... until death separates us." The words spoken hung in pain between us. Jamie smiled bitterly.
"And even longer," he said firmly and pulled him back to him.