«وَجَبَ التَّقْدِيرُ بِحَسَبِ الْقَرَائِنِ»
The omitted sense must be supplied according to the contextual clues.
A qarīnah is an expressed or contextual indicator from which the audience understands what has been omitted. It may occur in a later clause, in previous discourse, or in the situation shared by speaker and hearer.
Deletion is not simply a technique for reducing word count. If it leaves an indispensable meaning indeterminate, the expression may fail. If the context provides sufficient guidance, the listener can reconstruct the intended relation while the utterance becomes concise and effective.
Rule: the contextual evidence must support the degree of recovery needed for understanding the judgment. It need not always force a single verbatim reconstruction.
A general contextual indication calls for a general recovery; a particular indication calls for a particular one. A universal invitation and a reference to the particular messenger do not demand identical reconstructions.