Genut, Mordechai (2010). "טו באייר" [15 Iyar]. לוח דבר בעתו: ה'תשע"א [Luaḥ Davar be-ʻito: 5771 / Each Thing in its Proper Time] (in Hebrew). Bnei Brak: Ḳupat Gemaḥ Aḥiʻezer. p. 951. LCCN89645445. Retrieved 21 January 2013.
Genut, Mordechai (2010). "טו באייר" [15 Iyar]. לוח דבר בעתו: ה'תשע"א [Luaḥ Davar be-ʻito: 5771 / Each Thing in its Proper Time] (in Hebrew). Bnei Brak: Ḳupat Gemaḥ Aḥiʻezer. p. 951. LCCN89645445. Retrieved 21 January 2013.
A baraita cited in the Babylonian TalmudSukkah 25b offers two separate opinions: those carrying the body of Joseph (son of Jacob) (as per Genesis 50:25), or those who buried Aaron's sons Nadav and Avihu (as a consequence of the events of Leviticus 10:1–7). However, the Gemara rejects both of those possibilities and simply says that they had dealt with a met mitzvah (an unidentified person who had died).
Rashi, commenting on 9:7 and quoting Sifrei, suggests that the law was communicated in this way in order to reward the merit of those who asked.
shaalvim.org
Yakovson, Rabbi Yechezkel (31 August 2005). "Pesach Sheni". Yeshivat Sha'alvim. Retrieved 12 January 2013.