May one say 'Blessed is He who distinguishes between sacred and ordinary' in a restroom before doing work after Shabbat?

This source-based Torah study examines the question: May one say 'Blessed is He who distinguishes between sacred and ordinary' in a restroom before doing work after Shabbat? The canonical Hebrew discussion develops the issue through the weekly Torah portion and the sources cited there, preserving the distinctions, tensions, and practical implications of the original text. This localized discovery layer does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.