عَنْ أُمِّ حَبِيبَةَ زَوْجِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَتْ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ: ((لَوْلَا أَنَّ أَشُقَّ عَلَى أُمَّتِي لَأَمَرْتُهُمْ بِالسِّوَاكِ عِنْدَ كُلِّ صَلَاةٍ كَمَا يَتَوَضَّأُونَ))
It is narrated from Sayyida Umm Habibah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "If I had not feared hardship for my Ummah, I would have commanded them to use the miswak with every prayer, just as they perform ablution."