Muhammad said: The meaning of "yurhiqahuma" is: that he would drive them to "al-rahaq," which is ignorance.
قَالَ مُحَمَّدٌ: وَمَعْنَى يُرْهِقَهُمْا: أَيْ: يَحْمِلُهُمَا عَلَى الرَّهَقِ وَهُوَ الْجَهْلُ.