大毘盧遮那成佛神變加持經 (Shubhakarasimha & Yixing 724) 6.7

6.7

"Furthermore, Guhyakādhipati! A bodhisattva observes the precept against sexual misconduct: toward those possessed by others, one's own wife, and those protected by the marks of their own clans, he does not give rise to greedy thoughts, much less uniting two bodies in improper places. There are other forms of upāya where, according to those who should be saved, he embraces and protects sentient beings.