I will offer unto thee burnt sacrifices of fatlings - Margin, marrow. On the word rendered “burnt-offerings” see the notes at Isaiah 1:11. The word rendered “fatlings” is rendered in Isaiah 5:17, lambs. It may be applied to any animal considered as fat - a qualification required in sacrifices to be made on the altar, Isaiah 1:11.
With the incense of rams - The word here rendered incense is commonly applied to aromatics which were burned in the tabernacle or temple, producing a grateful odor (see the notes at Isaiah 1:13); but it seems here to be used with reference to the smoke ascending from burning rams offered in sacrifice - ascending as the smoke of incense did. The smoke thus ascending would be as grateful and acceptable as incense.
I will offer bullocks with goats - Bullocks and goats. That is, I will present sacrifices in all the forms required in worship; in all the forms that will express gratitude to God, or that will be an acknowledgment of dependence and guilt; in all that would properly express homage to the Deity. Bullocks and goats were both required in the ancient worship.