~ Zum Lieben zwei ~
Number one seems to have been left out here and is probably Trinken (drinking), but the rest seems to be part of a game that is being played. The pottery stein without lid is not marked, ca. 1900.
Zum Lieben zwei,
zum Spielen drei,
zum Singen vier,
das lob ich mir.
For loving two,
for playing three,
for singing four,
that is praiseworthy to me.
Translation: Roy de Selms
Photo credit: Unknown