In AV 'ability' is either material (Le 27:8; Ezr 2:69; Ac 11:29) or personal (Da 1:4; Mt 25:15) capacity. The mod. meaning ('mental power') is not found in AV.
But if he is poorer than the value which you have put on him, then let him be taken to the priest, and the priest will put a value on him, such as it is possible for him to give.
Every one, as he was able, gave for the work sixty-one thousand darics of gold, five thousand pounds of silver and a hundred priests' robes.
Young men who were strong and healthy, good-looking, and trained in all wisdom, having a good education and much knowledge, and able to take positions in the king's house; and to have them trained in the writing and language of the Chaldaeans.
And to one he gave five talents, to another two, to another one; to everyone as he was able; and he went on his journey.
And the disciples, everyone as he was able, made a decision to send help to the brothers living in Judaea:
Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain