The Kitáb-i-Aqdas
32.Abstain from food and drink from sunrise to sundown   ¶17
This relates to the period of fasting. In one of His Tablets, ‘Abdu’l-Bahá, after stating that fasting consists of abstinence from food and drink, further indicates that smoking is a form of “drink.” In Arabic the verb “drink” applies equally to smoking.