King James Version
But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.English Standard Version
"And when you pray, do not heap up empty phrases as the Gentiles do, for they think that they will be heard for their many words.New International Version
And when you pray, do not keep on babbling like pagans, for they think they will be heard because of their many words.