Taking nothing of the Gentiles] The missionaries whom Gaius had entertained had not been willing to receive assistance from the non-Christians among whom they had been labouring. While they might properly receive from those who had long been Christians, it would be of great importance that there should be not the least suggestion of selling the truth.
Related Commentaries of 3 John 1:7
3 John 1:7
7 Because that for his name's sake they went forth, taking nothing of the Gentiles.