The meaning of warbling and applause

1. We were told by Muhammed bin Hasan bin Ahmad bin Waleed, may Allah grant him mercy, that he said: We were told by Hussain bin Hasan bin Aban, from Hussain bin Sa’eed, from Hammad bin Isa, from Ibrahim bin Umar al-Yamani, from the one he mentioned, from Abu Abdillah, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «And their prayer was, at the House, not but warbling and applause.» (8:35) He said