John Gill Commentary 1 Samuel 12:4

"And they said, Thou hast not defrauded us, nor oppressed us, neither hast thou taken aught of any man`s hand." — 1 Samuel 12:4 (ASV)

And they said
One in the name of the rest, or they all cried out as one man:

you have not defrauded us, nor oppressed us ;
had done them no wrong, neither privately nor publicly, by fraud nor by force:

neither have you taken anything of any man's hand ;
as a gift, present, or bribe, to fit his cause. Some would infer from this that he took nothing of them for his support and maintenance, and that he lived upon his own substance; but that is not likely or reasonable; it was but just that they should support him and his family suitably to his character as a judge, whose whole life was spent in their service.