Rabban Gamliel says: Every day a person must pray the eighteen [blessings of the She-moneh Esrei]. R’ Yehoshua says: [He may recite] an abridgment of the eighteen [bless-ings]. R’ Akiva says: If his prayer is fluent in his mouth, he must pray the eighteen [bless-ings]; but if not, [he should pray] an abridgment of the eighteen.