Ka'b reported that Messenger of Allah ﷺ said that the similitude of a believer is that of a standing crop in a field which is shaken by wind and then it comes to its original position but it stands at its roots. The similitude of a non-believer is that of a cypress tree which stands on its roots and nothing shakes it but it is uprooted (with) one (violent stroke). (Using translation from Muslim 2810a)   

قَالَ رَسُولُ اللَّهِ ﷺ مَثَلُ الْمُؤْمِنِ مَثَلُ الْخَامَةِ مِنَ الزَّرْعِ تُفَيِّئُهَا الرِّيَاحُ تُعَدِّلُهَا مَرَّةً وَتُضْجِعُهَا أُخْرَى حَتَّى يَأْتِيَهُ الْمَوْتُ وَمَثَلُ الْكَافِرِ كَمَثَلِ الْأَرْزَةِ الْمُجْذِيَةِ عَلَى أَصْلِهَا لَا يُصِيبُهَا شَيْءٌ حَتَّى يَكُونَ انْجِعَافُهَا مَرَّةً وَاحِدَةً قَالَ أَبُو مُحَمَّد الْخَامَةُ الضَّعِيفُ