Manusmriti

siva.sh/manusmriti/2/205

गुरोर्गुरौ सन्निहिते गुरुवद् वृत्तिमाचरेत् । न चानिसृष्टो गुरुणा स्वान् गुरूनभिवादयेत् ॥ २०५ ॥

sanskrit

If his teacher’s teacher is near, let him behave (towards him) as towards his own teacher; but let him, unless he has received permission from his teacher, not salute venerable persons of his own (family).

english translation

gurorgurau sannihite guruvad vRttimAcaret | na cAnisRSTo guruNA svAn gurUnabhivAdayet || 205 ||

hk transliteration by Sanscript