The Kitáb-i-Aqdas - The Most Holy Book
Index term: Gambling and games of chance
k155.
Gambling and the use of opium have been forbidden unto you. Eschew them both, O people, and be not of those who transgress. Beware of using any substance that induceth sluggishness and torpor in the human temple and inflicteth harm upon the body. We, verily, desire for you naught save what shall profit you, and to this bear witness all created things, had ye but ears to hear.
n169.
Gambling
The activities that are included in this prohibition have not been outlined in the Writings of Bahá'u'lláh. As both 'Abdu'l-Bahá and Shoghi Effendi have indicated, it is left to the Universal House of Justice to specify the details of this prohibition. In response to questions about whether lotteries, betting on such things as horse races and football games, bingo, and the like, are included under the prohibition of gambling, the Universal House of Justice has indicated that this is a matter that will be considered in detail in the future. In the meantime, the Assemblies and individuals are counselled not to make an issue of these matters and to leave it to the conscience of the individual believers.
The House of Justice has ruled that it is not appropriate for funds for the Faith to be raised through lotteries, raffles, and games of chance.