Commentary for Exodus 6:9

ולא שמעו אל משה BUT THEY HEARKENED NOT TO MOSES — they did not accept his words of comfort.

BUT THEY HEARKENED NOT UNTO MOSES FOR IMPATIENCE OF SPIRIT, AND FOR CRUEL BONDAGE. It was not because they did not believe in G-d and in His prophet [that they hearkened not]. Rather, they paid no attention to his words because of impatience of spirit, as a person whose soul is grieved on account of his misery and who does not want to live another moment in his suffering even though he knows that he will be relieved later. The “impatience of spirit” was their fear that Pharaoh would put them to death, as their officers said to Moses,⁴⁷Above, 5:21. and the “cruel bondage” was the pressure, for the taskmasters pressed upon them and hurried them [in their daily task],⁴⁸Ibid., Verse 13. which gave them no chance to hear anything and consider it.

ולא שמעו אל משה, now, although initially, they did believe in Moses and his mission. As we know from Exodus 4,31 ויאמן העם, “the people believed,” this was based on their expecting immediate relief from their servitude. Now they had not only not experienced relief, but a worsening of their condition.