we did not abstain from sending miracles to any of our messengers. these miracles were called lies by the people who lived in ancient times. to the people of thamud we sent the shecamel as a visible miracle and they did injustice to it. we only send miracles as warnings.
وما منعنا أن نرسل بالآيات إلا أن كذب بها الأولون وآتينا ثمود الناقة مبصرة فظلموا بها وما نرسل بالآيات إلا تخويفا