It has been reported that the Prophet (salAllahu ‘alayhi wa sallam) said, “Theone who wakes up in the morning and complains about the scarcity of livelihood, it is as though he is complaining against his Lord. The one who wakes up and is sad over the affairs of the dunya, it is as though he has woken up angry with Allah, and the one who humbles himself in front of a rich man because of his wealth will have lost two-thirds of his Religion.”
Islam Shall Return 