'Abdu'l-Baha relates how the Hidden Words were written at this time.

Baha'u'llah would often go for a walk along the bank of the Tigris.

He would come back looking very happy and write down those lyric gems of wise counsel which have brought help and healing to thousands of aching and troubled hearts.

For years, only a few manuscript copies of the Hidden Words were in existence, and these had to be carefully concealed lest they should fall into the hands of the enemies that abounded, but now this little volume is probably the best known of all Baha'u'llah's works, and is read in every quarter of the globe.

The Book of Iqan is another well-known work of Baha'u'llah's written about the same period, towards the end of His sojourn at Ba_gh_dad (1862-1863 A.D.) Declaration at Ridvan( 14) near Baghdad After much negotiation, at the request of the Persian Government, an order was issued by the Turkish Government summoning Baha'u'llah to Constantinople.