question #1 Sahih Muslim 977a, Book 11, Hadith 136 : What is the significance of visiting graves in Islam and how has the ruling on it changed?

I forbade you to visit graves, but you may now visit them; I forbade you to eat the flesh of sacrificial animals after three days, but you way now keep it as along as you feel inclined; and I forbade you nabidh except in a water-skin, you may drink it from all kinds of water-skins, but you must not drink anything intoxicating.