Recite the Qur'an as long as your hearts agree to do so and when you find variance between them, then stand up.
Sahih Muslim Book 47, Hadith 4
← Previous Hadith Recite the Qur'an as long as your hearts agree to do so, and when you feel variance between them (between your hearts and tongues), then get up (and leave its recital for the time being).

Sahih Muslim Book 47, Hadith 3 Next Hadith → Recite the Qur'an. The rest of the hadith is the same.

Sahih Muslim Book 47, Hadith 5