73:6 in-na naashiatal layli hiya ashad-du waT'aw wa aqwamu qiylaa

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Ahmed Raza Khan: Mohammed Aqib Qadri:
Indeed getting up in the night is tougher, and the words flow with strength.

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

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