ل ِأنَّكَ فاتِرٌ، وَلَسْتَ حارّاً وَلا بارِداً، لِذَلِكَ سَأتَقَيَّأُكَ مِنْ فَمِي!»
So, because you are lukewarm, and neither hot nor cold, I will vomit you out of my mouth.