Torah Temimah cites Meilah 18a.
“When one commits a trespass” — from where that one’s own eating and another’s combine, even over a long interval? Scripture says “tim’ol ma’al” in any mode.
Ribbuy from the doubled “ma’al” — partial uses combine.
Partial uses that together reach a perutah of sacred value create full me’ilah liability. One’s own eating and another’s eating can combine, even across a long interval. The Torah’s doubled language includes every mode of misuse.