俱舍論疏 28.216

28.216

論「此中超者至超入第四」，述超唯至第三，隔一地名第三。不超二地，名不至第四。

[On] the śāstra's: "Herein, that which leaps ... leaps and enters the fourth": This explains that leaping only reaches the third [stage], where skipping one stage is called the third. One does not leap two stages, which is called not reaching the fourth.