The words of Allah the Exalted: "And beneath it was a treasure belonging to them"

Sayyiduna Abu Dharr al-Ghifari (may Allah be pleased with him) reports this as a marfu' hadith (The Prophet (peace and blessings be upon him) said:) "The treasure that Allah Almighty mentioned in His Book was a tablet of pure gold, on which was written: I am amazed at the one who has certainty in Divine decree and yet becomes distressed; I am amazed at the one who remembers Hell and still laughs; I am amazed at the one who remembers death and then becomes heedless. There is no god but Allah, and Muhammad (peace and blessings be upon him) is the Messenger of Allah."
Al-Bazzar recorded it through Bishr bin al-Mundhir from al-Harith bin Abdullah al-Yahsubi; I do not know either of them. The remaining narrators of this report are thiqat (trustworthy).

Sayyiduna Abu al-Darda' (may Allah be pleased with him) said regarding this statement of Allah Almighty: (Allah Almighty says:) "And beneath it was a treasure belonging to the two of them." Sayyiduna Abu al-Darda' (may Allah be pleased with him) said: For those people, amassing treasure was lawful and the spoils of war were made unlawful for them; for us, the spoils of war have been made lawful, and amassing treasure has been made unlawful for us. (Allamah Haythami says:) I say: Tirmidhi recorded a hadith from this Companion other than this one.
Tabarani recorded it; its chain contains Ishaq bin Abdullah bin Abi Farwah, who is matruk (abandoned).