Sitting in any convenient position

Narrated Anas bin Malik:

Whenever Allah's Apostle went to Quba, he used to visit Um Haram bint Milhan who would offer him meals;
and she was the wife of 'Ubada bin As-samit. One day he went to her house and she offered him a meal, and after that he slept, and then woke up smiling. She (Um Haram) said, "I asked him, 'What makes you laugh, O Allah's Apostle?' He said, 'Some people of my followers were displayed before me as warriors fighting for Allah's Cause and sailing over this sea, kings on thrones,' or said, 'like kings on thrones.' (The narrator, Ishaq is in doubt about it.) I (Um Haram) said, 'O Allah's Apostle! Invoke Allah that He may make me one of them.' He invoked (Allah) for her and then lay his head and slept again and then woke up smiling. I asked, 'What makes you laugh, O Allah's Apostle?' He said, 'Some people of my followers were displayed before me as warriors fighting for Allah's Cause and sailing over this sea, kings on the thrones,' or said, 'like kings on the thrones.' I (Um Haram) said, 'O Allah's Apostle! Invoke Allah that He may make me one of them.' He said, You will be amongst the first ones." It is said that Um Haram sailed over the sea at the time of Muawiya, and on coming out of the sea, she fell down from her riding animal and died.

حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّهُ سَمِعَهُ يَقُولُ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا ذَهَبَ إِلَى قُبَاءٍ يَدْخُلُ عَلَى أُمِّ حَرَامٍ بِنْتِ مِلْحَانَ فَتُطْعِمُهُ، وَكَانَتْ تَحْتَ عُبَادَةَ بْنِ الصَّامِتِ، فَدَخَلَ يَوْمًا فَأَطْعَمَتْهُ، فَنَامَ رَسُولُ اللَّهِ ﷺ ثُمَّ اسْتَيْقَظَ يَضْحَكُ. قَالَتْ فَقُلْتُ مَا يُضْحِكُكَ يَا رَسُولَ اللَّهِ فَقَالَ " نَاسٌ مِنْ أُمَّتِي عُرِضُوا عَلَىَّ غُزَاةً فِي سَبِيلِ اللَّهِ، يَرْكَبُونَ ثَبَجَ هَذَا الْبَحْرِ، مُلُوكًا عَلَى الأَسِرَّةِ ". ـ أَوْ قَالَ " مِثْلُ الْمُلُوكِ عَلَى الأَسِرَّةِ ". شَكَّ إِسْحَاقُ ـ قُلْتُ ادْعُ اللَّهَ أَنْ يَجْعَلَنِي مِنْهُمْ. فَدَعَا ثُمَّ وَضَعَ رَأْسَهُ فَنَامَ، ثُمَّ اسْتَيْقَظَ يَضْحَكُ فَقُلْتُ مَا يُضْحِكُكَ يَا رَسُولَ اللَّهِ قَالَ " نَاسٌ مِنْ أُمَّتِي عُرِضُوا عَلَىَّ، غُزَاةً فِي سَبِيلِ اللَّهِ، يَرْكَبُونَ ثَبَجَ هَذَا الْبَحْرِ، مُلُوكًا عَلَى الأَسِرَّةِ ". أَوْ " مِثْلَ الْمُلُوكِ عَلَى الأَسِرَّةِ ". فَقُلْتُ ادْعُ اللَّهَ أَنْ يَجْعَلَنِي مِنْهُمْ. قَالَ " أَنْتِ مِنَ الأَوَّلِينَ ". فَرَكِبَتِ الْبَحْرَ زَمَانَ مُعَاوِيَةَ، فَصُرِعَتْ عَنْ دَابَّتِهَا حِينَ خَرَجَتْ مِنَ الْبَحْرِ، فَهَلَكَتْ.