大乘義章 2.29

2.29

大乘法中心法亦多，而經論中不辨定數，難以輒言。開合如是（此二門竟）。

In the Mahāyāna doctrine, mental dharmas are also numerous, yet in the sūtras and treatises a fixed number is not determined, so it is difficult to state rashly. Such are expansion and contraction (these two gates are concluded).