Дигха Никая 1:1477
SUJATOevameva bhagavato sarīrassa jhāyamānassa yaṁ ahosi chavīti vā cammanti vā maṁsanti vā nhārūti vā lasikāti vā, tassa neva chārikā paññāyittha, na masi;
In the same way, when the Buddha’s corpse was cremated no ash or soot was found from outer or inner skin, flesh, sinews, or synovial fluid.