30-49 (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Muhammad ibn Sahl, on the authority of his father that he had asked Abul Hassan Al-Ridha (s), ‘What should one who has made ablutions do when he thinks that he has not wet a place of his face after he has finished making ablutions?’ The Imam (s) replied