This isn’t in direct support, but it came to mind. It shows, at least, that God doesn’t support ageism:
“Listen to me…you who have been carried since birth,
whom I have carried since the time you were born.
**In your old age, I shall still be the same,
when your hair is grey, I shall support you. **
I have already done so, I have carried you’
I shall still support and deliver you.” [Isaiah 46:3-4]
Best wishes and prayers for your continued service of God and other people.