The Bishop of Sheffield will lead prayers for a church organist who died days after being attacked on his way to midnight mass on Christmas Eve.
Grandfather Alan Greaves, 68, was discovered badly beaten by a member of the public just yards from his church in High Green, Sheffield, on Monday, but died from his injuries in hospital on Thursday night.
Two men remain in custody after being arrested on Saturday on suspicion of murder.
A South Yorkshire Police spokesman said: "A man in his 20s and a man in his 40s, both from Sheffield, have been arrested on suspicion of murder and are currently in custody helping police. Officers are searching a number of properties in the area and there has been a high-visibility police presence in High Green today."
The Bishop of Sheffield, Dr Steven Croft, will lead the Sunday morning service at St Saviour's Mortomley and High Green Church, as the community gathers to remember Mr Greaves.
A spokesman for The Diocese of Sheffield said: "The church service will follow the normal pattern of a liturgy reflecting the Sunday after Christmas but prayers will be offered for Alan, his wife Maureen and his family as well as for the wider congregation and community.
"Canon Simon Bessant, Alan's parish priest, has been offering pastoral and practical support since he found out about the attack on Christmas morning and he will join the Bishop and others in offering an act of worship which is fitting to Alan's gentle memory."
Detectives are still appealing for witnesses to come forward with any information about the murder.
Mr Greaves, a grandfather and father-of-four, died after sustaining serious head injuries at about 11.15pm on Christmas Eve after leaving his home to go to the church.
Police are treating his death as murder and have said the motive for the attack is unclear.