Natyashastra
शृङ्गारे चैव शोके च स्वच्छन्दगमने तथा । गतिः स्थितलया कार्याधिकलान्तरपातिता ॥ ३५॥
In love and sorrow, and also in easy walking, the gait should be slow, with steps falling at intervals longer than four Kalās.
english translation
zaRGgAre caiva zoke ca svacchandagamane tathA । gatiH sthitalayA kAryAdhikalAntarapAtitA ॥ 35॥
hk transliteration by Sanscript