In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Narrated ‘Amr bin ‘Auf an ally of the tribe of Bani ‘Amir bin Lu’ai and one of those who had witnessed the battle of Badr with Allah’s Messenger (sallal-lahu-alayhi-wasallam): Allah’s Messenger (sallal-laahu-alayhi-wasallam) sent Abu ‘Ubaida bin Al-Jarrah to Bahrain to collect the Jizya (tax). Allah’s Messenger (sallal-laahu-alayhi-wasallam) had concluded a peace treaty with the people of Bahrain and appointed Al ‘Ala bin Al-Hadrami as their chief; Abu Ubaida arrived from Bahrain with the money. The Ansar heard of Abu ‘Ubaida’s arrival which coincided with the Fajr (morning) prayer led by Allah’s Messenger of Allaah (sallal-laahu-alayhi-wasallam). When the Prophet (sallal-laahu-alayhi-wasallam) finished the prayer, they came to him. Allah’s Messenger (sallal-laahu-alayhi-wasallam) smiled when he saw them and said, “I think you have heard of the arrival of Abu ‘Ubaida and that he has brought something.” They replied, “Yes, O Messenger of Allaah!” He said, “Have the good news, and hope for what will please you. By Allah, I am not afraid that you will become poor, but I am afraid that worldly wealth will be given to you in abundance as it was given to those (nations) before you, and you will start competing each other for it as the previous nations competed for it, and then it will divert you (from good) as it diverted them.” 
Imaam Abdul Azeez Bin Baaz [rahimahullaah] said: In this [hadeeth], there is a warning against the Dunyah [worldly wealth]- not to be deceived by it and to be careful of its evil [consequences]. There is no harm [to engage in] business, but [they] should be careful of the evil [consequences] of wealth- neither be put to trial through it nor fall into that which Allaah has made unlawful. 
 Saheeh Al-Bukhaari, Book of Ae-Riqaaq, vol 8. Hadeeth number: 6425.
Al-Hulalul Ibreeziyyah Min At-Taliqaat Al-Baaziyyah Alaa Saheeh Al-Bukhaari. Page: 227. Footnote number 2. Slightly paraphrased]