Sahabi drinking blood and urine;Nabi SAW’s shadow,fruit of jannah

How authentic is it that a Sahabi drank the blood and another the urine of
Nabi (SAW).

How authentic is it that Nabi (SAW) did not have a shadow.
In the Quraan I came across only this fact that Allah ordered Adam (AS)
not to come near this tree. Nothing about not eating the fruit from a certain tree.
But then I hear Ulema mention in their lectures about not eating the fruit from a certain tree. Also I have heard from Ulema in lectures that that there is no Haraam and Halaal and no Paak & Napaak in Jannat. How come a fruit (if this is correct) is Haraam in Jannat?