Manusmriti

siva.sh/manusmriti/2/73

अध्येष्यमाणं तु गुरुर्नित्यकालमतन्द्रितः । अधीष्व भो इति ब्रूयाद् विरामोऽस्त्विति चारमेत् ॥ ७३ ॥

sanskrit

But to him who is about to begin studying, the teacher always unwearied, must say: Ho, recite! He shall leave off (when the teacher says): Let a stoppage take place!

english translation

adhyeSyamANaM tu gururnityakAlamatandritaH | adhISva bho iti brUyAd virAmo'stviti cAramet || 73 ||

hk transliteration by Sanscript