This hadeeth comes under the following chapter: PREFERENCE FOR OBSERVING NAFL PRAYER IN THE HOUSE, AND PERMISSIBILITY OF OBSERVING iT IN THE MOSQUE ALSO
Jabir reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When any one of you observes prayer in the mosque he should reserve a part of his prayer for his house, for Allaah would make the prayer as a means of betterment in his house.