'Smooth' in the Bible

Who have said to seers, 'Ye do not see,' And to prophets, 'Ye do not prophesy to us Straightforward things, Speak to us smooth things, prophesy deceits,

Among the smooth things of a brook is thy portion, They -- they are thy lot, Also to them thou hast poured out an oblation, Thou hast caused a present to ascend, For these things am I comforted?