1 story on this theme.
When Bahá'u'lláh lay chained in the Black Pit of Ṭihrán, condemned without cause and surrounded by the executions of His fellow-prisoners, help came from an unlooked-for quarter: the Russian Minister at the Persian court, who took up His case, pressed for His release, and afterward offered Him the protection of his government. Nabíl records it as one of the signs that no power on earth could extinguish the Cause of God.