Quran 73:6

Surely in the watches of the night the soul is most receptive and words more telling.

Indeed the watch of the night is firmer in tread and more upright in respect to speech,

Indeed getting up in the night is tougher, and the words flow with strength.

surely the first part of the night is heavier in tread, more upright in speech,

Indeed, (the) rising (at) the night, it (is) very hard and most potent and more suitable (for) Word.

Verily the rising by night! it is most curbing and most conducive to right speech.

Verily, the rising by night (for Tahajjud prayer) is very hard and most potent and good for governing (the soul), and most suitable for (understanding) the Word (of Allah).

Surely getting up at night is the best means of subduing the self and is more suitable for uprightness in speech.

Prayer at night leaves the strongest impression on one's soul and the words spoken are more consistent.

Surely the rising by night is the firmest way to tread and the best corrective of speech.

Lo! the vigil of the night is (a time) when impression is more keen and speech more certain.

Indeed, the first part of night is heavier in tread, and more upright in speech.

Indeed, the hours of the night are more effective for concurrence [of heart and tongue] and more suitable for words.

The vigil of night is more effective, and better suited for recitation.

Surely, getting up at night [for worship] is the most potent means of subduing the self and most suitable for the word [of prayer].

Truly the rising by night is most potent for governing (the soul), and most suitable for (framing) the Word (of Prayer and Praise).