天台菩薩戒疏 2.23

2.23

離間賢善戒第十九。稟性柔和名為賢善，乖隔彼此故云間善。和諍說訟菩薩所宜，今反離間欺謗，妨癈正修，故聖制也。別具四緣：一、是賢善，二、起兩舌離間之心，三、傳言往來，四、前人領解，便犯。言比丘者，乞士、破煩惱、怖魔，始終名比丘也。

Nineteenth: the precept against estranging the worthy and good. Having an endowed nature that is gentle and compliant is termed 'worthy and good'; causing division between this and that is therefore termed 'estranging the good'. Reconciling disputes and settling litigations is what is proper for a bodhisattva; now, on the contrary, one creates estrangement, deceives and slanders, obstructing and abandoning correct practice; hence the sage instituted [this precept]. It specifically comprises four conditions: 1. it is a worthy and good [person]; 2. giving rise to a divisive mind of double-tongued speech; 3. carrying words back and forth; 4. the person before one understands—then one commits an offence. As for the term bhikṣu: a mendicant, one who destroys afflictions, and one who frightens Māra; from beginning to end he is called a bhikṣu.