僧家第一戒 The First Vow Of Monks
那國王御手擎杯，先與唐僧安坐。三藏道：「貧僧不會飲酒。」國王道：「素酒，法師飲此一杯何如？」三藏道：「酒乃僧家第一戒。」那国王御手擎杯，先与唐僧安坐。三藏道：「贫僧不会饮酒。」国王道：「素酒，法师饮此一杯何如？」三藏道：「酒乃僧家第一戒。」
逐句解 Line by line
The king raised a cup in his own royal hand and first settled the Tang Monk in his seat.
御手 — his own royal hand — for the second time in two passages. 安坐 is the host's duty of seeing a guest properly seated.
Tripitaka said, "This poor monk does not drink wine."
The refusal comes without explanation, and the king will spend the next four exchanges trying to get round it.
The king said, "It is lenten wine. Might the Master of the Law drink this one cup?"
素酒 is lenten wine — unfermented or barely fermented, and reckoned permissible to abstainers. It is a real category and a real accommodation, and it is the king's first attempt at a loophole.
Tripitaka said, "Wine is the first of the monk's precepts."
The reply closes the loophole without arguing about it. The question was whether this particular wine counted; the answer is about the rule. 第一 is a fixed expression and keeps the full yī, resisting the tone shift the next word would otherwise force.
The king pours with his own hand and Tripitaka refuses in a line, without explanation. What follows is a small and entirely serious negotiation between a host who must do honour and a guest who cannot be honoured in the usual way.
Lenten wine is the king's first attempt at a loophole, and it is a real category — light enough that abstainers were reckoned able to take it. Tripitaka does not engage with it at all. The question was whether this particular wine counted; the answer is about the rule, and the rule comes first among the precepts.