تَتَجَافَىٰ جُنُوبُهُمْ عَنِ الْمَضَاجِعِ يَدْعُونَ رَبَّهُمْ خَوْفًا وَطَمَعًا وَمِمَّا رَزَقْنَاهُمْ يُنفِقُونَ ۝ فَلَا تَعْلَمُ نَفْسٌ مَّا أُخْفِيَ لَهُم مِّن قُرَّةِ أَعْيُنٍ جَزَاءً بِمَا كَانُوا يَعْمَلُونَ

These verses describe the righteous believers who sacrifice sleep for night prayers, approaching Allah with both fear (of His punishment) and hope (for His mercy). They also spend from their provisions in charity. Their reward is described as hidden "comfort for eyes" - joys so magnificent that no one can imagine them. The phrase "their sides forsake their beds" beautifully describes how they leave comfortable sleep for prayer. This teaches that voluntary night worship demonstrates sincere devotion, that approaching Allah should balance fear and hope, that charity should accompany worship, and that Allah's rewards far exceed human imagination. The hidden nature of the reward emphasizes that the greatest blessings are beyond current comprehension. This encourages believers to engage in voluntary worship and charity, trusting that Allah's rewards will surpass their expectations.