Dhammapada · 8.10

Abhivādanasīlissa, niccaṃ vuḍḍhāpacāyino;Cattāro dhammā vaḍḍhanti, āyu vaṇṇo sukhaṃ balaṃ.

Abhivadanasilissa, niccam vuddhapacayino; Cattaro dhamma vaddhanti, ayu vanno sukham balam.

For one habitually respectful, ever honoring elders, four qualities increase: long life, beauty, happiness, and strength.

— Dhammapada 8.10

Source: Pali text from the Khuddaka Nikāya of the Pali Canon (oldest extant Buddhist scripture, compiled c. 3rd century BCE). Public-domain English readings drawn from F. Max Müller's translation in Sacred Books of the East, Vol X (1881) and the Buddhist Publication Society's freely-licensed Acharya Buddharakkhita rendering.