294. hadíth
وَ إِنَّ رَسُولَ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ اِغْتَمَّ فَأَمَرَهُ جَبْرَئِيلُ عَلَيْهِ اَلسَّلاَمُ أَنْ يَغْسِلَ رَأْسَهُ بِالسِّدْرِ وَ كَانَ ذَلِكَ سِدْراً مِنْ سِدْرَةِ اَلْمُنْتَهَى.
And when the Messenger of Allah (saws) was distressed, Archangel Jibril (a.s) instructed him to wash his head with sidr (lote tree leaves), and this sidr was from the lote tree of Sidrat al-Muntaha (the utmost boundary in the heavens)."