You asked about My sons.... And one of them will be...
Translated
oceanoflights.org/bahaullah-additional-tablets-extracts-bahai-library-044-en/
You asked about My sons.... And one of them will be manifested through the power of the true Faith, and God will cause signs of His might to flow from his tongue. He is among those that God hath singled out for His Cause. There is no God but Him.
—Bahá’u’lláh