大般涅槃經義記 6.23

6.23

次觀外空，「外亦如是」舉後類前。三義同前故云如是。「無有內法」彰其異義。向前宣說內空之中無外財物，今此宣說外空之中無內陰法，有斯異耳。

Next is contemplating external emptiness. 'The external is also like this' adduces what follows by analogy with what precedes. Because the three meanings are the same as before, it says 'like this'. 'There are no internal dharmas' reveals its distinct meaning. Previously it was proclaimed that within internal emptiness there are no external wealth or objects; now it proclaims that within external emptiness there are no internal dharmas of the aggregates; there is this distinction.