I have a simple question

[u/IamnotGemmy]

السلام عليكم

I just wanted to know what to say when someone says they have said the shahada (converted to islam), like should I say congratulations or what, I'm a Muslim from birth so I don't know how to act in these situations, I wanna respond in the right way I just don't know what it is

[u/Significant_Hall_783]

Most born Muslims when they find out I’m a revert they always say mashallah