(Muhammad Assad)
39:20 As against this they who of their Sustainer are conscious shall [in the life to come] have mansions raised upon mansions high, beneath which running waters flow: [this is] Gods promise - [and] never does God fail to fulfill His promise.39:20
(Yousaf Ali)
39:20 But it is for those who fear their Lord. That lofty mansions, one above another, have been built: beneath them flow rivers (of delight): (such is) the Promise of Allah. never doth Allah fail in (His) promise.39:20