Nineteen-Day Fast
The fast was instituted by the Báb , and accepted by Baháʼu'lláh , the founder of the Baháʼí Faith , who stated its rules in his book of laws , the "Kitáb-i-Aqdas" . 
<triplet> Kitáb-i-Aqdas <subj> Baháʼu'lláh <obj> author