What are the conditions for permissibility when combining prayers during the time of the first prayer?

Chapter on the Traveler's Prayer

Al-Mughni

Book of Prayer

Book 3 · Issue 1 · Bab 11

Open in Qurani

Primary text

The existence of the permissible excuse must be considered at the time of commencing the first prayer, at its completion, and at the commencement of the second prayer. If the excuse ceases to exist during any of these three moments, combining the prayers is not permissible.