Is the “dark night of the soul” mentioned in the Bible? I saw a documentary where a priest said that the “dark night of the soul” is mentioned in the Bible, but I was not able to find where.

Is the “dark night of the soul” mentioned directly or indirectly in the Bible?
The phrase “dark night of the soul” comes from a poem by St. John of the Cross (1542-1591), a Spanish Carmelite monk and mystic, whose Noche obscura del alma is translated “The Dark Night of the Soul.” 

Its meant to be synonymous with traveling the “narrow way” that Jesus spoke of in Matthew 7:13-14.

So no, it is not mentioned in the Bible.

Sources:

Wikipedia entry for the peom in general

As well as this book from the Christian Classics Ethereal Library.