This is the scene of Bheeshma's taking a vow of whole life bachelorhood for clearing the way to his father's second marriage with Satyavathi,foster daughter of Daasha.
It was by this tremendous vow that he was hailed as Bheeshma(=tremendous).This new title took over and few remembered his original name Devavratha !
He was seen talking to Daasha at the later's residence.