Midrash su Salmi 140:14

(Devarim 1:10) "And you are this day": existing "as the stars of the heavens in multitude" — whence it was derived: There are seven classes of the righteous in Gan Eden — one higher than the other: the first class — (Psalms 140:14) "Only the righteous will give praise to Your name; the upright will dwell in Your presence." the second class — (Ibid. 65:5) "Praises to him You choose and draw near to dwell in Your courts." the third class — (Ibid. 84:5) "Praised are the dwellers in Your house." the fourth class — (Ibid. 15:1) "Who shall dwell in Your tent?" the fifth class — (Ibid.) "Who shall dwell on Your holy mountain?" the sixth class — (Ibid. 24:3) "Who shall ascend the mountain of the L-rd?" the seventh class — (Ibid.) Who shall stand in the place of His sanctity?"