Using hashish oil to soften the hair

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
What is the ruling on oil that is derived from hashish, to soften the hair etc.?
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Answer:

Praise be to Allaah.

If the oil is derived from the hashish which intoxicates and which is not allowed to be sold because it contains  forbidden intoxicating substances, it is not permissible to use it. Allaah does not put the cure of the ummah of Muhammad in something that He has forbidden for them. If the hashish in question is the hashish which causes intoxication and is classed as a drug, then it is not permissible to use it and treat disease with it. These drugs are harmful and are themselves a disease. It was narrated from Umm Salamah that the Prophet (peace and blessings of Allaah be upon him) said: “Allaah does not put the cure for my ummah in something that He has forbidden to them.” And Allaah knows best.

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

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