purple > red, blood-red beray > defile; asperse, bespatter
5 Als in her lap a lovely babe did play
Als > As; also
6 His cruel sport, instead of sorrow due;
due > fitting, proper; merited
7 For in her streaming blood he did embay
embay > bathe
8 His little hands, and tender joints imbrue;
joints > arms; limbs imbrue > steep; defile
9 Pitiful spectacle as ever eye did view.