case Yelverton against Yelverton Hilary term Elizabeth roll a covenant to  stand seize to a use of land which the covenantor shall afterward purchase be  void post Ro ab more Noy winch Fitzherbert salk will pale yellow on use Powel  on Dev b Com burr Cowp dougl term Rep term Rep term Rep upon demurrer the case  be the father covenant d by indenture in consideration of natural affection to  stand seize of all his land which he have and which he afterward shall  purchase to the use of himself for life and after to his youngrest son and his  heir afterward he purchase land and die and whether the old or young son shall  have it be the question Bacon argue for the young son that he shall have it  for this covenant show his intent express and be to work in going to be and  therefore good enough as if a man devise land which he have not and after  purchase they so if one covenant that he will purchase land before Michaelmas  and that before easter follow he will levy a find of those land which shall he  to such use and he levy a fine and do not limit any use it shall he accord to  the covenant before the purchase qudd to be concession per curian for they  shall he as use declare upon that fine whereof he show his intent before but  in the principal case all the court hold that this covenant vest nothing in  the young son and be not sufficient to vest a use in he of this croak  Elizabeth land for a man can by a covenant raise a use out of land which he  have not for no more than a man may charge let or grant a thing which he have  not no more may he liliait a use out of land which he have not also upon every  feoffinent or purchase the feoff or donor from who the land passes be to limit  the use to the feoff or purchaser then before the purchase one can limit how  the use shall he videlicet that it shall he to his young son where the feoff  have limit it to the use of he and his heir which shall he to limit a use out  of a use which the law will not suffer  therefore judgement be give accord for  the old son and here a case be cite in Elizabeth but neither the name nor in  what court be mention that a mortgagor entreat a stranger to redeem the jand  at the day and covenant by indenture that after such redemption the stranger  shall have the land to he and his heir and that he in consideration of such a  sum will stand seize to the use of he and his heir the stranger redeem the  land at the day the mortgagor enter the deed be enrol within the six month yet  rule that nothing pass because he have not any estate or interest therein at  that time to contract for it