#!/usr/bin/perl

# http://perlmonks.org/?node_id=1176579

use strict;
use warnings;

$_ = do { local $/; <DATA> };

print map s/\s+/ /gr =~ s/\s*$/\n/gr, /(\b\d+:\d+\b(?:(?!\b\d+:\d).)*)/gs;

__DATA__
3:3 And he shall offer of the sacrifice of the peace offering an

offering made by fire unto the LORD; the fat that covereth the

inwards, and all the fat that is upon the inwards, 3:4 And the two

kidneys, and the fat that is on them, which is by the flanks, and the

caul above the liver, with the kidneys, it shall he take away.

3:5 And Aaron's sons shall burn it on the altar upon the burnt

sacrifice, which is upon the wood that is on the fire: it is an

offering made by fire, of a sweet savour unto the LORD.