Allah'u'Abhá

Question: Do ablutions performed for the Obligatory Prayer suffice for the ninety-five repetitions of the Greatest Name? Answer: It is unnecessary to renew the ablutions.

Bahá’u’lláh, Kitáb-i-Aqdas, Question 77

‘Abdu’l-Bahá encourages the use of the sacred phrase Alláh-u-Bahá as a focus for invocation. “The Greatest Name should be found upon the lips in the first awakening moment of early dawn. It should be fed upon by consistent use in daily invocation, in trouble, under opposition, and should be the last word breathed when the head rests upon the pillow at night. It is the name of comfort, protection, happiness, illumination, love and unity.

‘Abdu’l-Bahá, Wisdom of the Master, p. 58

Question - What is the reason that every one should mention every morning, ninety five times, the Greatest Name; i.e., Allah'u'Abhá! "It is only for mentioning the name of God, for to commemorate His Holy Name causes us to advance toward Him and to be more vigilant."

Unauthenticated Tablet or talk attributed to ‘Abdu’l-Bahá, Barstow collection, at http://www.bahai-library.com/zamir/barstow2.html#151

Reciting the Greatest Name means to repeat it over and over, silently or out loud.

Shoghi Effendi, Unfolding Destiny, p. 450

The Bahá’ís are free to greet each other with Allah'u'Abhá when they meet, if they want to, but they should avoid anything which to outsiders, in a western country, might seem like some strange oriental password. We must be very firm on principles and laws, but very normal and natural in our ways, so as to attract strangers!

Shoghi Effendi, Lights of Guidance, p. 266

When using the Greatest Name the words 'Allah-u-Abhá should be used and not 'Ya Bahá'u'l-Abhá'.

Shoghi Effendi, Lights of Guidance, p. 269