What is the meaning of "in the custody of Allah" for one who prays the 'Isha or Fajr prayer?

The Hadith narrated by Muslim from Jundub ibn Abdullah, may Allah be pleased with him, states that the Messenger of Allah, peace and blessings be upon him, said: "Whoever prays the Fajr prayer is under the protection of Allah. So, let not Allah demand anything from you regarding His protection, for whoever He demands something from regarding His protection, He will seize him. Then He will throw him on his face into the Fire of Hell."

This Hadith indicates the virtue of the Fajr prayer and the importance of preserving it. It shows that whoever preserves it will be under Allah's protection, security, and covenant. It also warns against harming anyone who has prayed Fajr, because such a person is under Allah's protection. And whoever violates Allah's protection has exposed himself to severe retribution.