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The evidence is the saying of Allāh's Messenger (ṣallallāhu ʿalayhi wasallam):
I seek refuge with you from the trial of poverty.[1]
And also his saying:
Seek refuge in Allāh from poverty, scarcity and humiliation, and that you oppress (others) or are oppressed.[2]
Supplication is from the keys of opening upon sustenance and it also repels poverty and tribulations.