The 7 day week

Is Porphyry attributing the 7 day week to Ostanes the Magi here?: "The gods frequently make it  manifest   by  foreshowing   their  decrees,  that   knowing  the conditions under   which  each  individual is born  they  are,  if one  may so say, consummate diviners  ami casters of nativities. Apollo also, in an oracular response, has said: 'Invoke Mercury, and  the Sun  in  like  manner  on  the  day  of  the  Sun,  and  the Moon when her day comes, and Saturn  also, and Venus in succession, with  unuttered prayers, which the best by far of the Magi  devised,  the  king  of  the  seven-toned  [harp], whom  all [men]  know.'   But when the hearers said, 'You mean Ostanes,' he added:  'And  also according  to each  enduring god strongly to make the sound  seven times.'"