Painting time as a concept is very difficult. Once solution is to show the Fates, as depicted by Rubens, Goya, Burne-Jones, Jacek Malczewski and others.
Epitomising human attitudes to life and death for millennia, they spin the thread of life, measure the length allotted to each person, and cut that length with shears.
The Greek Fates transferred to Norse legend, to Shakespeare’s three witches, even to Terry Pratchett. But you may have misread a lovely Velázquez.