May mayim acharonim, the hand-washing after a meal, be performed with saliva?

This source-based Torah study examines the question: May mayim acharonim, the hand-washing after a meal, be performed with saliva? The canonical Hebrew article develops the issue through the weekly Torah portion and the sources cited there. This localized discovery layer preserves the question and the source identity; it does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.