There was a cry of great acclamation in Henen-nesu, [a cry] of joy in Naref, when Osiris appeared [as King] in the place of Re; He had inherited His throne and was ruling the Two Lands and all the people —

The company of Gods was well content thereat but Set was in great despair:

‘I would that You give Me the panoply of the Universal Lord,’ said Osiris to Re, ‘for then Set would respect Me when He saw My appearance as Yours and there would come to me all the people, commoners, citizens, noblemen — all — who would see how You have established My respect and created My authority.’

Now it seemed good to Re to do all that He had said, whereupon Set came and He cast His face upon the ground when He saw what Re had done for Osiris, and the blood flowed from [Set’s] nose — and that is how agriculture began (variant adds ‘in Henen-nesu’).

But, on the very day He wore it, Osiris had much suffering in His head from the heat of the Atef crown which [He wore] that men and Gods should respect Him. And when Re returned in the evening to see Osiris in Henen-nesu, He found [Osiris] in His house with His head angry and swollen from the heat of the Atef crown.

Then Re proceeded to let out the pus and the blood and Re said to Osiris:

‘Behold, You are freed from the blood and the pus which were hurting Your head.’

https://warboar.wordpress.com/2013/04/10/herishef_blood_osiris/
(via the-typhonian)