The Kitáb-i-Aqdas - The Most Holy Book
Index term: acceptable as witnesses, under Non-Bahá’í­(s)
n99.
two just witnesses
Bahá’u’lláh sets out “the criterion of justness” in relation to witnesses as “a good reputation among the people”. He states that it is not necessary that the witnesses should be Bahá’í­s since “The testimony of all God’s servants, of whatever faith or creed, is acceptable before His Throne” (Q&A 79).
q79.
 
Question: Concerning the criterion of justness when proving some matter dependent on the testimony of two just witnesses.
Answer: The criterion of justness is a good reputation among the people. The testimony of all God’s servants, of whatever faith or creed, is acceptable before His Throne.