Visuddhimagga VI-37

Liṅgato pana itthiliṅgaṃ vā purisaliṅgaṃ vāti avavatthapetvā paṭhamavaye vā majjhimavaye vā pacchimavaye vā ṭhitassa idaṃ sarīranti vavatthapetabbaṃ.

②「以相」，并不是说确定其女相或男相，当确定这尸体是青年、中年或老年的。

Ñ(VI,37): (2) Instead of defining it by the female mark or the male mark, he should define it by its mark thus: 'This is the body of one who was in the first phase of life, in the middle phase, in the last phase'.