Astanga Hrudaya
ब्रह्मचर्यरतेर्ग्राम्यसुखनिःस्पृहचेतसः। निद्रा सन्तोषतृप्तस्य स्वं काले नातिवर्तते॥६८॥
these bring about the pleasure of good sleep. For those who follow the regimen of celibacy, who are not very crazy of sexual intercourse and who are contented with happiness, sleep will not be very late than its regular time.
english translation
brahmacaryaratergrAmyasukhaniHspRhacetasaH। nidrA santoSatRptasya svaM kAle nAtivartate॥68॥
hk transliteration by Sanscript