大般若波羅蜜多經般若理趣分述讚 3.51

3.51

讚曰：出世間中一切智為本，舉此攝餘，清淨法盡。三乘總觀諸無我智，名一切智。

The Commentary says: In the supramundane realm, omniscience is the root; by raising this, the rest are subsumed, and pure dharmas are exhausted. The wisdom that generally contemplates all selflessnesses across the three vehicles is called "omniscience".