Is it permissible for me to say to myself, "O Allah, bless him," if I admire something belonging to a disbeliever?

The peaceful disbeliever (whether a mu'ahid or a dhimmi) has his life, property, and honor protected. It is not permissible to harm him or transgress against him without a legitimate religious right. This is indicated by the Prophet’s (peace and blessings be upon him) sayings: "Beware, if anyone wrongs a mu'ahid, or diminishes his rights, or burdens him beyond his capacity, or takes anything from him against his will, I will be his adversary on the Day of Judgment," and "Whoever harms a dhimmi, I am his adversary."

Therefore, if a Muslim sees something that impresses him, whether from a Muslim or a peaceful disbeliever, he should recite the prescribed remembrances, such as "What Allah wills, there is no power except with Allah," as stated in the verse: "And why did you not, when you entered your garden, say, 'What Allah wills, there is no power except with Allah'" (Quran 18:39). This is to prevent harm from the evil eye, for the dhimmi or mu'ahid disbeliever's life and property are to be respected.