That which can hurt Him are the evil deeds which the beloved of God commit

The imprisonment inflicted on this wronged One, O Dhabíḥ, did to Him no harm nor can it ever do so; nor can the loss of all His earthly goods, His exile, or even His martyrdom and outward humiliation, do Him any hurt. That which can hurt Him are the evil deeds which the beloved of God commit, and which they impute to Him Who is the Sovereign Truth. This is the affliction from which I suffer, and to this He, Himself, Who is potent over all things, beareth Me witness. That which hath sorely hurt Me are the claims which the people of the Bayán are advancing every day. Some have proclaimed their allegiance to one of My Branches (Sons), while others have asserted independently their claims, and acted after their own desires.

(Gleanings from the Writings of Bahá’u’lláh Translated By Shoghi Effendi)

https://www.bahai.org/library/authoritative-texts/bahaullah/gleanings-writings-bahaullah/6#618644675