Adam Clarke on Exodus 23:3

Neither shalt thou countenance a poor man in his cause - The word דל dal, which we translate poor man, is probably put here in opposition to רבים rabbim, the great, or noble men, in the preceding verse: if so, the meaning is, Thou shalt neither be influenced by the great to make an unrighteous decision, nor by the poverty or distress of the poor to give thy voice against the dictates of justice and truth. Hence the ancient maxim, Fiat Justitia, Ruat Coelum. "Let justice be done, though the heavens should be dissolved."