Mawulana Ashraf Ali Tharanvi
The rights of the Holy Angels are as follows:
1. To believe in the reality of their existence.
2. To believe that they are innocent and can commit no sins.
3. To pronounce the salutary words "peace be upon them.
4. To avoid entering a mosque after eating things emitting foul smell or emitting'" wind” in the mosques, as these offend the Angels. There are many other acts that offend and annoy them which must be avoided, e.g, keeping pictures, keeping dogs without any necessity, telling lies, staying in Janabah (spiritual impurity) due to laziness and staying naked without any necessary cause even in privacy.
Rights in Islam
www.taleemulislam.net