As long as you do not lie

بِسْــــــــــــــــــمِ اﷲِالرَّحْمَنِ اارَّحِيم

Abu Huraira reported: It was said, “O Messenger of Allah, do you joke with us?” 

He, peace be upon him, said, 

“Indeed, I do not say anything but the truth.”

( Sunan At-Tirmidhi )

عَنْ أَبِي هُرَيْرَةَ قَالَ

 قَالُوا يَا رَسُولَ اللَّهِ إِنَّكَ تُدَاعِبُنَا

 قَالَ إِنِّي لَا أَقُولُ إِلَّا حَقًّا

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ