Garudapurana 1.160.27

1.160.27

mūtradhāraṇaśīlasya mūtrajastatra gacchataḥ /
alobhaḥ pūrṇadhṛtimānkṣobhaṃ yāti saranmṛdu //

In a person accustomed to suppressing urine, the urine-born [enlargement] occurs moving there; / without greed, possessing full firmness, soft and shifting, it undergoes agitation;