Adam Clarke on Joshua 10:26

Smote - slew - and hanged them on five trees - Hanging alive seems a barbarous custom: among the Hebrews, criminals were first deprived of life; this was the debt required by justice: then they were hanged up, perhaps generally by the hands, not by the neck; this was done by way of example, to deter others from committing the crimes for which those had suffered: but they were never permitted to hang thus exposed all night, as this could have answered no purpose, either of justice or example, as they could not be seen in the night-season. One day also was deemed enough for their exposure, it being thought sufficient to show the public that justice had been executed; and to have exhibited them longer would have appeared to be a barbarous cruelty which attempted to extend punishment beyond the possible requisitions of justice. See the note on Deu 21:23.