Can Allah Be Harmed?

S 3:144 And Muhammad is nothing but a messenger. The messengers passed away before him. So if he dies or is killed, you turn back on your heels? And he who turns back on his heels will not harm Allah at all. And Allah will reward the grateful.

S 3:176 And let those who hasten into kufr not grieve you. They will not harm Allah at all. Allah wants not to make them a share in the hereafter. And theirs is great torture.

S 3:177 Those who have bought kufr with faith will not harm Allah at all and theirs is painful torture.

S 9:39 Except you stampede he will torture you with a painful torture and substitute a people other than you and you will not harm him at all and Allah is mighty over everything.

S 47:32 Those who have disbelieved and have blocked from the way of Allah and have opposed the messenger after the guidance has been made clear to them, they will not harm Allah at all and he will make their deeds worthless.

Allah can't be harmed. But:

Narrated Jabir bin `Abdullah:

Allah's Messenger (ﷺ) said, "Who would kill Ka`b bin Al-Ashraf as he has harmed Allah and His Apostle ?" Muhammad bin Maslama (got up and) said, "I will kill him." So, Muhammad bin Maslama went to Ka`b and said, "I want a loan of one or two Wasqs of food grains." Ka`b said, "Mortgage your women to me." Muhammad bin Maslama said, "How can we mortgage our women, and you are the most handsome among the Arabs?" He said, "Then mortgage your sons to me." Muhammad said, "How can we mortgage our sons, as the people will abuse them for being mortgaged for one or two Wasqs of food grains? It is shameful for us. But we will mortgage our arms to you." So, Muhammad bin Maslama promised him that he would come to him next time. They (Muhammad bin Maslama and his companions came to him as promised and murdered him. Then they went to the Prophet (ﷺ) and told him about it.

https://sunnah.com/bukhari:2510

Allah CAN be harmed.