What did the Prophet Muhammad (saw) do when he arrived at the house of Harnza bin 'Abdul Muttalib (peace be upon him)?
 Narrated `Ali:                     The Prophet asked for his Rida, put it on and set out walking. Zaid bin Haritha and I followed him till he reached the house where Harnza (bin `Abdul Muttalib) was present and asked for permission to enter, and they gave us permission.