The servant exists between hands of Allah at two times: while standing during performing prayer and standing on the Day of Resurrection. Whoever fulfills the rights of the first standing, will in fact be facilitating the second one, and whoever considers this easy and does not pay due attention to it, he will be making the other one difficult for himself.
Allah, the Almighty says, which means,
“And during night, prostrate yourself to Him (i.e.the offering of Maghrib and ‘Isha’ prayers), and glorify Him a long night through (i.e. Tahajjud prayer). Verily! These (disbelievers) love the present life of this world, and put behind them a heavy Day (that will be hard).” (AI-Insan, 76:26-27)
Source: Al-Fawaaid – A COLLECTION OF WISE SAYINGS – Imam Ibn AI-Qayyim,
Rendered into English by: Bayan Translation Services