"My belief is that it is unlawful to say funeral prayers for those who pray behind the non-Ahmadis, for in my view such people are outside the pale of Ahmadiyat. Similarly, it is unlawful to say funeral prayers for those who give their daughters in marriage to the non-Ahmadis and die without offering repetance for this sin". (Letter of Mirza Bashir-ud-Din Mahmood Ahmad, published in Al-Fazl, April 13, 1926).
Could you kindly provide me with the referenced material as I would like to read the whole statement?