"Umar bin Al-Khattab wrote to some of his workers saying: 'Give to the Muslims thickened grape juice when two thirds of it have gone and one-third is left.'"
Sunan an-Nasa'i Book 51, Hadith 177
← Previous Hadith "Sell it as juice to one who will make At-Tila' (thickened grape juice) with it, and not Khamr (wine) with it."

Sunan an-Nasa'i Book 51, Hadith 176 Next Hadith → "I saw the letter of 'Umar bin Al-Khattab to Abu Musa (in which he said): 'A caravan came to me from Ash-Sham carrying a thick black paint like the pitch that is daubed on camels. I asked them how long they cooked it, and they told me that they cooked it until it was reduced by two-third. So the bad two-third had gone, one-third to take away evil and one-third to take away the bad smell. So let those who are with you drink it."

Sunan an-Nasa'i Book 51, Hadith 178