ENOfficial
Shu’bah said: I asked Simak about the meaning of KUTHBAH. He said: A small quantity of milk.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ الْغَنِيِّ بْنُ أَبِي عَقِيلٍ الْمِصْرِيُّ، حَدَّثَنَا خَالِدٌ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ - قَالَ قَالَ شُعْبَةُ فَسَأَلْتُ سِمَاكًا عَنِ الْكُثْبَةِ فَقَالَ اللَّبَنُ الْقَلِيلُ .
sunnah.com