Shemot 6:12-14

Orthodox Jewish Bible

¹² And Moshe spoke before Hashem, saying, See, the Bnei Yisroel have not paid heed unto me; how then shall Pharaoh hear me, who am of aral sefatayim (uncircumcised lips, stumbling speech, sealed lips)?

¹³ And Hashem spoke unto Moshe and unto Aharon, and gave them a charge unto the Bnei Yisroel, and unto Pharaoh Melech Mitzrayim, to bring the Bnei Yisroel out of Eretz Mitzrayim.

¹⁴ These are the Rashei Bais Avotam: The Bnei Reuven the bechor Yisroel; Chanoch, and Pallu, Chetzron, and Carmi: these are the mishpokhot of Reuven.