2.3.12 गत्यर्थकर्मणि द्वितीयाचतुर्थ्यौ चेष्टायामनध्वनि

For going etc., if there is चेष्टा (bodily movement) but no directional indication(अनध्वनि), then both द्वितीया and चतुर्थी are implied.