where can i go to find a marriage dispensation or something of the relevance for a jose domingo cervantes who had married maria nieves terrones on may 2,1798 in cinega de mata , jalisco mexico.

where can i go to find a marriage dispensation or something of the relevance for a jose domingo cervantes who had married maria nieves terrones on may 2,1798 in cinega de mata , jalisco mexico. 8 childrens name were found in records pertaining to cinega de mata mexico such as maria diega , antonio , feliciano just to name a few names. mothers name in marriage record of maria terrones and or domingo only lists jose cervantes mother as juana? no maiden name to her or anything has been found on as yet and they are of my 6th great grandparents.