Help in identifying Bach aria

[Henri Dumont]

Hello everyone.

Today I started singing this melody for no reason, since I've not listened to it recently; I know it's from a Bach cantata, I can hear the instruments clearly(!), yet I'm having great difficulties in finding it. Any help would be appreciated .

I've tried to play it on the piano to the best of my abilities.

[carito]

BWV 205 - 3 : Wie will ich lustig lachen ?

[Luke]

I don't think it's that, looking at the score - though I can see the similarities - but I can't be more help than that I'm afraid.

[Luke]

I reckon it's the first Aria from BWV 80, Ein feste Burg

[carito]

Yes, many thanks

This tune kept running through my head and I couldn't remember what cantata it was.