(18) If a man have a stubborn and rebellious son, that will not hearken to the voice of his father, or the voice of his mother, and though they chasten him, will not hearken unto them;
Igros Moshe, Yoreh De’ah Vol. 3, Siman 35. The following is a translation of what he writes by Rabbi Aaron Tendler:
“It is obviously forbidden to smoke marijuana, as this violates many basic laws of our Torah. First of all, it physically injures the person. Even if there are people who are not physically affected by this, it mentally affects the person as it destroys his mind, and prevents him from understanding things properly. This is a terrible thing, since not only can the individual not properly study Torah, he also can not pray and properly perform Mitzvos (commandments), since doing them mindlessly is considered as if they were not done at all. Furthermore, he is creating within himself a very strong desire (addiction?), which is much stronger than the desire to eat, etc. which are necessary for a person to live. There are many that can not control and withstand this desire. This is a very grave prohibition, as we find that a Ben Sorer U’Moreh [is killed] (See Deut. 21:18) for creating within himself a very strong desire, even though it is to eat Kosher food! How much more so it is forbidden for a person to bring upon himself an even greater desire, especially for something that a person does not need at all…"
(12) And Aaron took as Moses spoke, and ran into the midst of the assembly; and, behold, the plague was begun among the people; and he put on the incense (marijuana), and made atonement for the people. (13) And he stood between the dead and the living; and the plague was stayed.
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(no clue where this quote is from )
Shulchan Aruch
“Also, one will beautify [Shabbat candle lighting] when the wick is made from cotton, flax or cannabis…”