Who do I ask for a reference after a layoff? - 12 weeks in

My manager was laid off too and I am unsure who to use as a reference. Any experience at all would help. A colleague offered to vouch for me. Who did you use?

Ask former colleagues and supervisors in a short message and give them a summary of the job you are applying for.

I kept a note of my results so my references could be specific. They appreciated it.