Islam is the religion built on proofs/evidences. I see some posters using the term "Khuda Hafiz” which according to the text below is wrong. Don't wish to sound extreme but remember one thing all - the tongue might be the thing that takes most of the people to the Hellfire. It is light to move but the results can be the most weighty. All our goods deeds - in fact all our Islam - can be negated by the tongue e.g. to mock Allah.
What is your view regarding the greeting “Khuda Hafiz” which is said by
many muslims upon departing?
As for khuda Hafiz - then I do not see it permissible to say, because:
1) The word khuda (god) is used in Persian to be a name of a particular idol; they worship even presently in Iran and other places. And when you say Hafiz
(protect) with it, you mean May Khuda (the Persian idol) protect you. This is from one angle.
2) From another angle, at the least if the above is not accepted, (which is the case from some who may argue that: "we don’t know of any Persian idol called Khuda and we take the literal meaning, god…" etc.) then it is a Bid’ah because:
a) This was not mentioned by the prophet (sallallaahu alayhi wa sallam) or the
Sahaabah, they did not do this, nor did the Messengers (alayhi sallam) leave us without a saying for greeting / parting. It is authentically reported from many Hadeeth, that the messenger (sallallaahualayhi wa sallam) told us to say “assalaamu alaikum wa rahma…” to the end…
So why do we see fit to abandon the Sunnah for the Bid’ah (innovation) when the Salaf use to say… "No Sunnah is abandoned except a Bid’ah appears to replace it…"
b) Also the prophet (sallallaahu alayhi wa sallam) said that every Bid’ah is a
leading astray, and every leading astray will lead to the fire. So this Hadeeth
shows that a Bid'ah will start small then end up becoming big (by being a sending astray first - then progressing to put one in the fire...).
So now look, those who accepted the explanation in (1) above then changed to saying “Allaah Hafiz" which is not shirk in speech, but now an innovation which people will find hard to reject, so by that the Bid’ah has become more anchored and thus progressing to put us in the fire. This is all that comes to my mind right now.
Taken from http://calltoislam.com/pdf/Saying%20...dul-Qaadir.pdf
(with a small correction made to point one above - a typo I believe)