न चैनं सहसाक्रम्य जरा समधिरोहति ।
स्थिरीभवति मांसं च व्यायामाभिरतस्य च ॥
na cainaṁ sahasākramya jarā samadhirohati |
sthirībhavati māṁsaṁ ca vyāyāmābhiratasya ca ||
(Suśruta-saṁhitā: Cikitsā-sthāna, 4.42)
“Old age does not assail one suddenly. The flesh of one who engages in exercise remains firm.”