It is a great מצוה to bury the dead and to eulogize them, and to take special pains to eulogize a Torah scholar and to weep for his passing. Abraham taught us this as the Torah reports: ויבא אברהם לספוד לשרה ולבכותה, "Abraham arrived to mourn for Sarah and to weep for her" (Genesis 23,2). Even though this commandment is not enumerated as a separate positive commandment in the 613 commandments, it is included in the general commandment והלכת בדרכיו, "endeavor to emulate G–d's ways; just as He buries the dead, (quoting G–d burying Moses in Deut. 34,6) so you too are enjoined to bury the dead," as we have discussed at the beginning of פרשת וירא.