By default source repositories are listed in /etc/apt/sources.list (with appropriate "deb-src" lines) so that "apt-get source" works. However, if you don't need this feature, you can disable those entries and save some bandwidth during "apt-get update" operations.
S wudem amezwer, ikufan n teɣbalut ttwabedren-d deg /etc/apt/sources.list (s yizirigen "deb-src" i ilaqen) i wakken "apt-get source" ad yeddu. Ɣas akken, ma yella ur tesriḍ ara tamahilt-a, tzemreḍ ad tsenseḍ inekcumen-a yerna ad teskelseḍ kra seg tehri n tesfift deg tmahlin n "apt-get update".