Through the same chain, it is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah, the Mighty and Majestic, tests one of you with trials just as one of you tests his gold with fire. Some of it comes out like pure gold; that is the one whom Allah, the Mighty and Majestic, has protected from doubts. Some of it comes out like gold of a lesser quality; that is the one who doubted somewhat. And some of them come out like black gold; that is the one who has fallen into trial (fitnah)."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7667