On this day, or on the fourteenth, twenty-first, twenty-eighth, or thirty-fifth day after the birth, several religious ceremonies are required to be performed; but they are most approved if observed on the seventh day. One of these is the naming. I believe, however, that it is a more common custom to give the name almost immediately after the birth, or about three hours after. Astrologers were often consulted on this occasion; but the following directions are given on higher authority, and are generally followed.--"The father should give his son a good name, ... not a name of self-praise, as Rasheed [Orthodox], Emeen [Faithful], etc.... The Prophet said, 'The names most approved by God are ´Abd-Allah [Servant of God] and ´Abd-Er-Raḥmán [Servant of the Compassionate], and such like.' He also said, 'Give my name, but do not distinguish by my surname of relationship:' but this precept, they say, respects his own lifetime, ... because he was addressed, 'O Abu-l-Ḳásim!' and now it is not disapproved; but some disapprove of uniting the name and surname, so as to call a person Moḥammad and Abu-l-Ḳásim. And if a son be called by the name of a prophet it is not allowable to abuse or vilify him, unless the person so named be facing his reproacher, who should say, 'Thou' [without mentioning his name]: and a child named Moḥammad or Aḥmad should be [especially] honoured.... The Prophet said, 'There is no people holding a consultation at which there is present one whose name is Moḥammad or Aḥmad, but God blesseth all that assembly:' and again he said, 'Whoever nameth his child by my name, or by that of any of my children or my companions, from affection to me or to them, God (whose name be exalted) will give him in Paradise what eye hath not seen nor ear heard.' And a son should not be named King of kings, or Lord of lords; nor should a man take a surname of relationship from the name of the eldest of his children; nor take any such surname before a child is born to him."[218] The custom of naming children after prophets, or after relations or companions of Moḥammad, is very common. No ceremony is observed on account of the naming.