TGAs28(1) 58.1.22 :התם לא עבד ארעא שליחותה הכא עבד ארעא שליחותה‏ : in that case the ground does not do what it is supposed to, in this case the ground does what it is supposed to
See the entire entry for šlīḥū, šlīḥūṯā n.f. mission