Prātaḥkälotthāna (Wakeup time):
ब्राह्मे मुहूर्त उत्तिष्ठेत् स्वस्थो रक्षार्थमायुषः ।
In order to protect his life, healthy person should get up from the bed in brähma muhūrta.
Notes:
Brahma muhürta
Basing on the above statement it is inferred that unhealthy or diseased person need not wakeup early in the morning and has to follow the instructions of the physician concerned. Brähma muhürta is the time, which is second half of the last yama (3 hours) of the night or early hours of the dawn i.e. approximately at about 4.24 Α.Μ.
Aruņadatta in his 'Sarvängasundarī commentary on Aştänga Hrdaya it is clearly stated as-
रात्रेचर्तुदशो मुहूर्ती ब्रह्मो मुहूर्तः ।
That means brahma muhūrta is the 14th muhürta käla of the night. One muhürta is equivalent to 48 minutes.
Whole night consists 15 muhūrtas=15 x 48=720 minutes.
Brahma muhūrta is the time, which is after the completion of 13 muhürtas in the night time i.e. 13 x 48-624 minutes.
720 - 624=96 minutes.
Hence one has to getup from the bed early in the morning 96 minutes before sunrise i.e. at about 4.24 a.m.
It is the suitable time to study and obtain knowledge. It is also the time when all the three doșas are in the equilibrium state.
