Translation:

1. By the Night as it conceals (the light);

Notes (Tafseer)

6159. The evidence of three things is invoked, viz., Night, Day, and Sex, and the conclusion is stated in verse 4, that men's aims are diverse. But similarly there are contrasts in nature. What contrast can be greater than between Night and Day? When the Night spreads her veil, the sun's light is hidden, but not lost. The sun is in his place all the time, and will come forth in all his glory again in his own good time. Cf. xci. 3, 4, and n. 6149. Man pursuing diverse aims may find, owing to his own position, Allah's light obscured from him for a time, but he must strive hard to put himself in a position to reach it in all its glory.