俱舍論疏 9.101

9.101

論「因馳求故至此位名有」，此出第十有支體也。「積集能牽當有果業」者，別前異後也。「此位名有」者，總以五蘊名為有也。《正理論》云「取增盛時種種馳求善、不善境，為得彼故，積集眾多能招後有淨、不淨業。此業生位總名有支。應知此中由此依此能有當果，故立有名。」准此論文，名為有者，有當果也。

The treatise says: "Because of running about seeking... this state is named becoming (bhava)." This presents the intrinsic nature of the tenth link, bhava. "Accumulating karma capable of pulling the fruit of future existence" distinguishes what precedes and differentiates what follows. "This state is named bhava" means that the five skandhas collectively are named bhava. The Nyāyānusāra states: "When grasping increases and flourishes, one runs about in various ways seeking good and unwholesome objects; in order to obtain them, one accumulates many pure and impure karmas that can bring about a subsequent existence. The state in which this karma is produced is collectively named the link of bhava. It should be known that here, because of this and relying on this, one can have a future fruit; hence the name bhava is established." According to this text, the reason it is named bhava (existence/having) is that it has the future fruit.