He disliked putting the dregs of Nabidh into (new) Nabidh lest it become strong because of the dregs.
Sunan an-Nasa'i Book 51, Hadith 206
← Previous Hadith Umm Al-Fadl sent word to Anas bin Malik, asking him about Nabidh made in an earthenware jar. He told her about his son An-Nadr, who used to make Nabidh in an earthenware jar in the morning and drink it in the evening.

Sunan an-Nasa'i Book 51, Hadith 205 Next Hadith → "The dregs are what intoxicates."

Sunan an-Nasa'i Book 51, Hadith 207