«فَإِذَا كَانَ مَا قَبْلَهَا قَابِلًا لِلِامْتِدَادِ، وَمَا بَعْدَهَا يَصْلُحُ غَايَةً لَهُ كَانَتِ الْكَلِمَةُ عَامِلَةً بِحَقِيقَتِهَا»
Where the preceding act admits continuation and the following event can serve as its limit, hatta works in its literal sense.
First, the earlier action must be capable of duration or repeated performance. Second, the event following hatta must plausibly terminate that course of action—such as nightfall or a person's intervention.
When both conditions hold, the legal effect of an oath or condition is assessed by reference to that actual continuation and its boundary.