Brahmana Bra1hman2a , consisting of Vidhi and Artha-va1da , i. e. directions for the detail of the ceremonies at which the Mantras were to be used and explanations of the legends &c. connected with the Mantras [see {brAhmaNa} , {vidhi}] , both these portions being termed {zruti} , revelation orally communicated by the Deity , and heard but not composed or written down by men [cf. I. W. 24 &c.] , although it is certain that both Mantras and Brahmanas were compositions spread over a considerable period , much of the latter being comparatively modern ;