And give the relatives their due, meaning those who are not parents among the relatives after recommending them. And they should be given their due: and their due, if they are close relatives like parents and children, and poor individuals unable to earn, and if the man is wealthy: is to spend on them according to Abu Hanifa. Al-Shafi'i does not see spending except on children and parents alone.

And if they are wealthy, or if they are not close relatives: like the sons of uncles, then their due is to maintain ties with them through affection, visiting, good companionship, and support in times of ease and hardship, and similar acts. And the poor and the wayfarer means: and give these their due from the zakat. This is evidence that what is meant by giving relatives their due is to provide for them financially. It was said that by 'the relatives' he meant the relatives of the Messenger of Allah, blessings and peace be upon him.

Wastefulness is the squandering of wealth in what is not appropriate. And spending it in a manner of extravagance. The pre-Islamic period used to slaughter their camels and waste their wealth in pride and reputation, and they mentioned this in their poetry. So Allah commanded spending in ways that bring one closer to Him and earn His favor. And from Abdullah: it is spending wealth in a manner that is not rightful. And from Mujahid:

If one were to spend a measure in falsehood, it would be wastefulness, and some of them spent in good and more than necessary, so his companion said to him: There is no good in extravagance. He replied: There is no extravagance in good. And from Abdullah ibn Amr: The Messenger of Allah, blessings and peace be upon him, passed by Sa'd while he was performing ablution and said: What is this extravagance, O Sa'd? He said: Is there extravagance in ablution? He said: Yes, even if you are by a flowing river. [Narrated by Ibn Majah, Ahmad, Abu Ya'la, and Al-Bayhaqi from his narration. In its chain is Ibn Lahi'ah, who is weak.]

Brothers of the devils are like them in wickedness, and this is the utmost blame, for there is no evil like that of the devil. Or they are their brothers and companions because they obey them in what they command them regarding extravagance.

Or they are their companions in the Fire as a warning. And the devil was ungrateful to his Lord, so he should not be obeyed, for he only calls to what he does himself. And Al-Hasan read: Brothers of the devil.