One reason is that blessing consists of goodness and bounty, whereas anger pertains to retribution and justice. Mercy prevails over anger, so He attributes to Himself the more perfect of the two—that which takes precedence and is stronger. This is the Quran’s manner: it attributes good things and blessings to Him while leaving the agent unstated when speaking of their opposites. Thus, the believers among the jinn say:
72:10 “We do not know whether evil is intended for those on earth or whether their Lord intends guidance for them.”
Another example is what al-Khidr says concerning the wall and the two orphans:
18:82 “So your Lord intended that they should reach maturity and recover their treasure.”
Concerning his making a hole in the ship, he says:
18:79 “So I intended to damage it.”
Then he says afterward:
“I did not do it of my own accord.”
Consider also His words, Most High:
2:187 “It has been made lawful for you to be intimate with your wives on the nights of fasting.”
And His words:
5:4 “Forbidden to you are carrion, blood, and the flesh of swine.”
And His words:
4:24 “Your mothers are forbidden to you in marriage.”
Then He says:
“All women beyond these are lawful to you.”
His singling out those on the straight path as recipients of blessing indicates that blessing in its fullest sense is what brings lasting success. Blessing in general, however, extends to believers and disbelievers alike: all creation enjoys His blessings. This settles the dispute over whether Allah bestows any blessing upon the disbeliever.
Blessing in its fullest sense belongs to the people of faith, while blessing in general may be granted to believers and disbelievers alike. As Allah Most High says:
14:34 “If you were to count Allah’s blessings, you could never enumerate them. Indeed, mankind is most unjust and ungrateful.”
Blessing is a form of benevolence—indeed, it is benevolence itself. The benevolence of the Lord Most High extends to the righteous and the wicked, the believer and the disbeliever. Benevolence in its fullest sense, however, is reserved for those who fear Allah and those who do good.
The second reason is that Allah, Glorified is He, alone bestows blessings:
16:53 “Whatever blessing you have is from Allah.”
Thus, what He alone bestows is attributed to Him. If a blessing is attributed to anyone else, it is because they are a means and a channel through which it comes. As for anger against His enemies, it is not exclusive to Him