“Recite ye the verses of God every morn and eventide.” (Bahá’u’lláh, ‘The Kitáb-i-Aqdas’)

December 27

I swear by God, O King! Wert thou to incline thine ear to the melodies of that Nightingale which warbleth in manifold accents upon the mystic bough as bidden by thy Lord, the All-Merciful, thou wouldst cast away thy sovereignty and set thy face towards this Scene of transcendent glory, above whose horizon shineth the Book of the Dawntide, and wouldst expend all that thou possessest in thine eagerness to obtain the things of God. Then wouldst thou find thyself raised up to the summit of exaltation and glory, and elevated to the pinnacle of majesty and independence. Thus hath the decree been recorded in the Mother Book by the Pen of the All-Merciful.  
- Baha'u'llah  (Tablet to Nasiri’d-Din Shah, Suriy-i-Haykal [Tablet of Temple]; ‘The Summons of the Lord of Hosts’)