Is it permissible to give one's brother from Zakat money for his marriage, knowing that his salary and share from a business venture are insufficient to cover the marriage expenses?

It is permissible to give the poor brother from Zakat if he does not find what suffices him for his necessities from his work and business ventures. What is considered part of his sufficiency includes what enables him to marry if he needs to marry, provided that the expenses are within the bounds of legitimate necessities, without extravagance or waste.