Mahabharat

siva.sh/mahabharat/virata-parva/4/29

हास्यवस्तुषु चाप्य अस्य वर्तमानेषु केषु चित नातिगाढं परहृष्येत न चाप्य उन्मत्तवद धसेत ।। ४-४-२९ ।।

sanskrit

'Even when something amusing occurs, one should not burst into loud laughter like a madman, nor should he display excessive seriousness by forcefully restraining himself.' ।। 4-4-29 ।।

english translation

hAsyavastuSu cApya asya vartamAneSu keSu cita nAtigADhaM parahRSyeta na cApya unmattavada dhaseta || 4-4-29 ||

hk transliteration by Sanscript