(67:15) It is He who made the earth tame for you - so walk among its slopes and eat of His provision - and to Him is the resurrection. (67:16) Do you feel secure that He who [holds authority] in the heaven would not cause the earth to swallow you and suddenly it would sway? (67:17) Or do you feel secure that He who [holds authority] in the heaven would not send against you a storm of stones? Then you would know how [severe] was My warning. (67:18) And already had those before them denied, and how [terrible] was My reproach. (67:19) Do they not see the birds above them with wings outspread and [sometimes] folded in? None holds them [aloft] except the Most Merciful. Indeed He is, of all things, Seeing. (67:20) Or who is it that could be an army for you to aid you other than the Most Merciful? The disbelievers are not but in delusion. (67:21) Or who is it that could provide for you if He withheld His provision? But they have persisted in insolence and aversion.