Listen to Hum Kab Se Hain Sai online. Hum Kab Se Hain Sai is a Hindi language song and is sung by Manhar Udhas. Hum Kab Se Hain Sai, from the album Sai Dil, was released in the year 2010. The duration of the song is 5:49. Download Hindi songs online from JioSaavn.