It is narrated from Sayyiduna Thawban (may Allah be pleased with him), the freed slave of the Messenger of Allah (peace and blessings be upon him), that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "If I were given the whole world and all that is in it in exchange for this verse, I would not be as pleased (as I am at receiving this verse): 'O My servants who have transgressed against themselves, do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Oft-Forgiving, the Most Merciful.'" Then a man asked him (peace and blessings be upon him): "And the one who associated partners with Allah (what is the ruling about him)?" The Prophet (peace and blessings be upon him) said: "Except the one who associated partners with Allah (he will not be forgiven)."
In the printed copy of Dar al-Haramayn it is written like this (al-Hubuli), and probably the correct word is al-Jublani.
Hadith Referenceالمعجم الأوسط / باب الألف / 1890
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 22795، والطبراني فى «الأوسط» برقم: 174»