Consistent prayer requires planning. Unnecessary late-night activity may make waking for Fajr difficult; a reasonable sleep routine can help.
Example 1: Preparing to wake for Fajr rather than staying up needlessly shows respect for prayer.
Example 2: Illness, safety concerns, and other genuine constraints should be evaluated appropriately; a statement of merit should not become a blanket accusation against every person facing difficulty.
The prepositional expression فِي جَمَاعَةٍ describes the manner in which the prayer is performed.