首楞嚴義疏注經 6.244

6.244

富樓那辯才無礙，祕密法門微妙開示，得無所畏。今揀說法不離聲名句文，所開悟人須先成熟，不由無種便能入道。若散心說，但成有漏，非曰圓通。

Pūrṇa had unhindered eloquence, and through subtle explanation of the secret Dharma-doors obtained fearlessness. Here it is selected out: preaching the Dharma does not depart from sounds, names, sentences, and texts; those who are awakened must have already matured, for without seeds one cannot enter the Path. If spoken with a distracted mind, it only constitutes outflows, and is not termed perfect penetration.