dwell on
linger over

I tried not to linger over the photo, to look away, to move on.

Only a moment I lingered over her, then began to run.

She would have liked to linger over the land a little longer.

I lingered over it, but still finished long before anyone else.

I lingered for a while over a cup of tea.

You all know about the trial, so there is no need to linger over it.

He was pleasant, but never lingered long over small talk.

She would linger over her own breakfast, then spend the rest of the morning in the study, working.

"Would you mind if I lingered over the last of the wine?"

He lingered over the words as though enjoying the situation.