Oh man, you should also keep awake in His remembrance at night and put yourself in the practice of Simran, Dyhan and Bhajan.

By such practical not only does the soul become fresh but also the mind and the body gain freshness. No fatigue of any kind remains.

Farid says:

God distributes musk at night. Those who are asleep cannot receive this Gift.

At night such beautiful solitude envelopes us that it can be compared to a river containing innumerable precious jewels of spirituality. Whoever is awake in devotion at the time becomes wealthy, for the wealth of the Sound Current can be received by the devotee almost gratuitously. 

Hafiz has also said that the early morning devotion and sighs over separation from Him constitute the key to the Treasure of Naam.