"Ubadah bin Samit and Mu'awiyah happened to meet, either in a church or in a synagogue. 'Ubadah bin Samit narrated to them and said: 'The Messenger of Allah (ﷺ) forbade us from selling silver for silver, gold for gold, wheat for wheat, barley for barley, and dates for dates.'I one of them said: "And salt for salt," but the other did not say it. "And he commanded us to sell wheat for barley, or barley for wheat, hand-to-hand, however we wished."
Sunan Ibn Majah Book 12, Hadith 118
Yahya related to me from Malik from Yahya ibn Said that Abdullah
ibn Masud said to a certain man, "You are in a time when men of
understanding (fuqaha) are many and Qur'an reciters are few, when the
limits of behaviour defined in the Qur'an are guarded and its letters
are lost, when few people ask and many give, when they make the prayer
long and the khutba short, and put their actions before their desires.
A time will come upon men when their fuqaha are few but their Qur'an
reciters are many, when the letters of the Qur'an are guarded
carefully but its limits are lost, when many ask but few give, when
they make the khutba long but the prayer short, and put their desires
before their actions."
Muwatta Malik Book 9, Hadith 97
"The Prophet used to say: 'Allahumma inni a'udhu bika minal-hammi wal hazani, wal-kasali, wal-bukhli, wal-jubni, wa dala'id-dain, wa ghalabatir-rijal (O Allah, I seek refuge with You from worry, grief, laziness, miserliness, cowardice, difficult debt and being overpowered by men.)'"
Sunan an-Nasa'i Book 50, Hadith 49