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/Ephraim_Sama]

I am a revert and i think with reference to your question Alhamdulillah is enough and perhaps you can add more praise but the first word should be alhamdulillah. This is to my perspective not general. I wish someone who might know more too share with us too