Which preposition to use with natis

in Occurrences 1%

" I say with him in A. Gellius, "let us maintain the vigour of our souls with a moderate cup of wine," Natis in usum laetitiae scyphis, "and drink to refresh our mind; if there be any cold sorrow in it, or torpid bashfulness, let's wash it all away.

Which preposition to use with  natis