Q25: There is a Hadith narrated from the Prophet (peace be upon him) in which he forbids cursing the face, because Allah created Adam in His image. What is the correct understanding of this Hadith ?
A: This Hadith has been verified as authentically reported from the Prophet (peace be upon him), in which he said:
سنن أبو داود الحدود (4493) ، مسند أحمد بن حنبل (2/434). If any one of you strikes (another), he should avoid the face, for Allah created Adam in His image. 
According to another version: In the image of the All-Merciful. This statement is not meant to compare or anthropomorphize Allah. According to the scholars, this refers to the fact that Allah created Adam with the ability to hear, see, and speak at will. These are also attributes of Allah, for He is All-Hearing, All-Seeing, and He speaks when He wants, and He has a Face, may He be glorified and exalted. However, this does not imply that there is any resemblance or likeness between the created and the Creator, as the image of Allah differs from that of His creatures. What is meant is that He is All-Hearing, All-Seeing, He speaks when He wants, and He has a Face; and He created Adam also able to hear and see; with a face, hands and feet, and the ability to speak at will. But humans’ faculties of hearing, seeing, speaking, as well as their image, bear no resemblance to those of Allah, (except for the terms used to identify them). Rather Allah has Attributes that befit His Majesty and Might, and nothing can be compared to Him, and man has attributes that befit him, attributes that are finite, imperfect and weak, whereas the Attributes of Allah are perfect, everlasting, and infinite, with no shortcomings. Therefore, Allah, may He be glorified and exalted, describes Himself, saying (what means):
Surah Al-Shura, 42: 11
There is nothing like Him; and He is the All-Hearer, the All-Seer. 
(Surah Al-Shura, 42: 11)
Surah Al-Ikhlas, 112: 4 And there is none co-equal or comparable to Him. (Surah Al-Ikhlas, 112: 4)Thus, it is not permissible to slap or curse the human face.
source : http://www.alifta.com/Fatawa/FatawaChapters.aspx?View=Page&PageID=26&PageNo=1&BookID=8
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