Two MSPs and an MP spoke at a rally held in Glasgow on Wednesday, against plans to redefine marriage in Scotland.
The event, organised by campaign group Scotland for Marriage, saw 100 people gather at Macdonald Crutherland House to listen to speeches from MSPs John Mason, Murdo Fraser and MP Michael McCann.
Ahead of the event, Mr Mason warned about the need for safeguards for traditional marriage supporters.
He said: “As a member of the Equal Opportunities Committee I think my main aim will be to examine what protections are in place for celebrants, denominations, public sector workers, third sector volunteers and others who do not agree with same sex marriage.”
He added: “We have had assurances on this from both Scottish and Westminster governments but I remain far from convinced these are deliverable.”
Mr McCann said lessons should be learnt from the mistakes in the Westminster legislation.
And Mr Fraser said it was impossible to introduce gay marriage without “interfering with the religious liberties of those who take a contrary view”.
The Scotland for Marriage petition against redefining marriage reached 50,000 signatures earlier this week.
The 50,000th supporter was 20-year-old Iain Donoghue, a third-year student from Falkirk.
He said: “I feel that it is entirely unnecessary to change the existing law. Marriage is between one man and one woman to the exclusion of others with a view to the procreation of children.”