Dear Respected Mufti Saheb D B.
Is the following correct, if so where is it to be found?
Forty days before the arrival of guests an angel comes to bring their provision (rizq). Because we cannot either see or answer the greetings of the angel, Allah sends Jibrail (as) to answer for us.
The rizq of the guests is of nine parts: one the guests consume themselves during their stay, and the remaining eight benefit the host and his/her family.
The du’a of the guest is answered, so when you are a guest always make sure to say a blessing du’a for your host family. The household that receives many guests is very blessed.