butter - rather, “cream,” literally, “thick milk.” Wherever I turned my steps, the richest milk and oil flowed in to me abundantly. Image from pastoral life.
When I washed my steps - Literal washing of the feet in milk is not meant, as the second clause shows; Margin, “with me,” that is, “near” my path, wherever I walked (Deu 32:13). Olives amidst rocks yield the best oil. Oil in the East is used for food, light, anointing, and medicine.