Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marks of Men and Women
पुरुषस्त्रीलक्षणम्
व्याप्नोति यस्त्रिकव्यापी त्रिवलीमान्नरस्त्वसौ ।उदरे वलयस्तिस्रो नरं त्रिविनतं शृणु ॥ ११ ॥
In the full Agni Purana this is chapter 243, verse 11.
He who spreads over these is 'three-spreading'. That man has three folds: three rings on the belly. Now hear about the 'three-bowing' man.
Simple meaning: He who spreads far is called three-spreading. A man with three folds has three rings on the belly.
देवतानां द्विजानां च गुरूणां प्रणतस्तु यः ।
Bowing to gods, brahmins and teachers is three-bowing. Knowing the right time for duty, wealth and desire is the other.
उरो ललाटं वक्त्रं च त्रिविस्तीर्णो विलेखवान् ।
A wide chest, forehead and face are good. So are hands and feet with banner and umbrella lines.
अङ्गुल्यो हृदयं पृष्ठं कटिः शस्तं चतुःसमम् ।
Fingers, chest, back and waist matching is praised. A good height is 96 finger-widths.