looking for song title,only know a few words.."God's not asking very much of you,it was very upbeat

[MississippiAngel]

it was by an African-American group,i remember,some of the words are "God's not asking very much of you,all he's asking you is that you do your part,the harvest is plenty,the laborers are few.... and one of the other lines is "be a fisher of men and hook'em in... may not be enough to go on,but any help would be appreciated