Musnad Ahmad Hadith 8230

And the Noble Prophet (peace be upon him) explained the command of Allah, "Enter the gate prostrating," by saying that the Children of Israel were told to enter the city dragging themselves on their buttocks and to say, "Hittah" (O Allah, forgive us), but they changed this word and began to say, "Habbah fi sha'rah" (we want grains of barley).