 it was easy for them to pay money to build mosques because it was obvious to people.. and because he heard praise for him from people so he thought that he was working for god but he was working for someone other than god.. and god knows best about that.. and his intention was anger towards him.. and he only said i meant that it was for god almighty.
وإنما خف عليهم دفع المال فى بناء المساجد لظهور ذلك بين الناس.. ولما يسمع من الثناء عليه من الخلق، فيظن أنه يعمل لله وهو يعمل لغير الله.. والله أعلم بذلك.. وإنما نيته عليه غضب.. وإنما قال قصدت أنه لله تعالى.