SequenceCases

SequenceCases[list, patt] gives a list of the sublists in list that match the sequence pattern patt.

SequenceCases[list, patt -> rhs] gives a list of the values of rhs corresponding to sublists that match patt.

SequenceCases[list, patt, n] includes only the first n matches.

Examples

Find consecutive pairs:

SequenceCases[{a, b, c, d}, {x_, y_}]
(* {{a, b}, {c, d}} *)

Extract matching sequences:

SequenceCases[{1, 2, 3, 4, 5}, {x_, y_} /; y == x + 1]
(* {{1, 2}, {2, 3}, {3, 4}, {4, 5}} *)

Please visit the official Wolfram Language Reference for more details.