俱舍論記 17.22

17.22

「加行善根先已退故」者，釋。加行善根聞、思二惠至斷善時，先加行位已退捨故。至正斷善，唯斷生得，非斷加行。問：加行善心能發戒不？空法師有三解：一云加行善心不能發戒，戒是斷善捨，邪見但斷生得善故。二云加行善心亦能發戒，然不能斷，以強勝故。然諸論說加行善根先不成者，據劣弱者說；若強勝者，牢固不捨。三云加行發戒，將斷善時必先作法捨彼戒故，然後斷善。三解俱與《正理》相違。故《正理》四十二云「諸律儀果有從加行、有從生得善心所生。若從加行善心生者，律儀先捨，後斷善根。然斷善根加行、根本皆名斷善，依此故說斷善根位捨諸律儀。若從生得善心生者，隨斷何品能生善根，所生律儀爾時便捨，捨能等起彼隨捨故（已上論文）。」

Regarding "Because the prepared wholesome roots have already been fallen away from beforehand": Explanation. Because the prepared wholesome roots, namely the two wisdoms of hearing and reflection, have already been fallen away from and abandoned beforehand in the preparatory stage by the time the wholesome is severed. When it comes to the actual severing of the wholesome, it severs only the innate, not the prepared. Question: Can a prepared wholesome mind give rise to restraint (saṃvara)? Master Kong has three explanations: The first says that a prepared wholesome mind cannot give rise to restraint; restraint is abandoned upon the severing of the wholesome, and wrong view only severs innate wholesome [roots]. The second says that a prepared wholesome mind can also give rise to restraint, but it cannot be severed because it is powerful and superior; when the various treatises say that prepared wholesome roots are not previously possessed, they speak in terms of the weak and inferior ones; if they are powerful and superior, they are firm and not abandoned. The third says that if restraint is generated by preparation, one must, when about to sever the wholesome, first perform the formal act of abandoning that restraint, and only then sever the wholesome. All three explanations contradict the Nyāyānusāra. Therefore Nyāyānusāra, fascicle 42, states: "The fruits of restraint are produced from either a prepared or an innate wholesome mind. If produced from a prepared wholesome mind, the restraint is abandoned first, and subsequently the wholesome roots are severed. However, both the preparatory and the fundamental stages of severing the wholesome roots are called severing the wholesome; relying on this, it is said that restraint is abandoned at the time of severing the wholesome roots. If produced from an innate wholesome mind, then in accordance with whichever grade of root capable of generating it is severed, the restraint produced is abandoned at that time, because when that which is capable of equal origination is abandoned, it is abandoned along with it." (Thus far the text of the treatise).