Drinking water instead of gargling the mouth when making ghusal

Q: I performed fard ghusl. I performed the two fard of washing my whole body and putting water in my nose but before I rinsed my mouth, I drank a glass of water (to fulfill the obligation of gargling, as I was advised to drink a glass of water to fulfill the gargling) but then I forgot about rinsing my mouth. I rinsed my mouth the next day when I remembered but did not gargle as I had already drank water the day before it to suffice for gargling. So is the fard of washing the mouth now complete and my ghusl valid? 

Receiving interest money

Q: If x person doesn't have a good income in his business and his business is going in a loss. He doesn't have any other source of income. This x person has a relative who has some money saved in a bank. The bank gave interest to x person's relative for his money in the bank. Can the relative give this interest amout to x person? 

The attributes of Allah Ta'ala

Q: I read this somewhere:

Also, As-Suddi said, "When a man would come to the two angels they would advise him, `Do not fall into disbelief. We are a test.' When the man would ignore their advice, they would say, `Go to that pile of ashes and urinate on it.' When he would urinate on the ashes, a light, meaning the light of faith, would depart from him and would shine until it entered heaven. Then something black that appeared to be smoke would descend and enter his ears and the rest of his body, and this is Allah's anger. Isn’t Allah’s Anger His Attribute alone so how would it enter a human being?

Taking a commission for outsourcing work when working for a company

Q: I am currently working in a company as a senior executive. I was given a task by my management to find a guy who would fix a tube well (water well). I found a guy and called him to our office to confirm the project with my management. I requested this guy for a commission after the completion of the project. Is it permissible in Islam to take commission for this kind of outsourced work?