Imaam Ibnul Qayyim (rahimahullaah) said:
The slave has two standings in the presence of Allaah: His standing in the presence of Allaah in prayer and his standing in the presence of Allaah on the day of judgement.
So whoever establishes the rights of the first standing, the other standing will be easy upon him. And whoever neglects this standing and did not fulfil its rights, that other standing will be severe upon him. Allaah (The Most High) said:
‘’And during night, prostrate yourself to Him (i.e. the offering of Maghrib and ‘Ishaa’ prayers), and glorify Him a long night through (i.e. Tahajjud prayer). Verily! These (disbelievers) love the present life of this world, and put be-hind them a heavy Day (that will be hard).” (¹)(²)