I heard the Prophet ﷺ saying, "A good dream is from Allah, and a bad dream is from Satan. So if anyone of you sees (in a dream) something he dislikes, when he gets up he should blow thrice (on his left side) and seek refuge with Allah from its evil for then it will not harm him."  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ الرُّؤْيَا مِنَ اللَّهِ وَالْحُلْمُ مِنَ الشَّيْطَانِ فَإِذَا رَأَى أَحَدُكُمْ شَيْئًا يَكْرَهُهُ فَلْيَنْفِثْ حِينَ يَسْتَيْقِظُ ثَلاَثَ مَرَّاتٍ وَيَتَعَوَّذْ مِنْ شَرِّهَا فَإِنَّهَا لاَ تَضُرُّهُ وَقَالَ أَبُو سَلَمَةَ وَإِنْ كُنْتُ لأَرَى الرُّؤْيَا أَثْقَلَ عَلَىَّ مِنَ الْجَبَلِ فَمَا هُوَ إِلاَّ أَنْ سَمِعْتُ هَذَا الْحَدِيثَ فَمَا أُبَالِيهَا  

(a companion of the Prophet ﷺ and one of his cavalry men) "I heard Messenger of Allah ﷺ saying, "A good dream is from Allah, and a bad dream is from Satan; so, if anyone of you had a bad dream which he disliked, then he should spit on his left and seek refuge with Allah from it, for it will not harm him."  

قَتَادَةَ الأَنْصَارِيّ َ وَكَانَ مِنْ أَصْحَابِ النَّبِيِّ ﷺ وَفُرْسَانِهِ قَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الرُّؤْيَا مِنَ اللَّهِ وَالْحُلْمُ مِنَ الشَّيْطَانِ فَإِذَا حَلَمَ أَحَدُكُمُ الْحُلُمَ يَكْرَهُهُ فَلْيَبْصُقْ عَنْ يَسَارِهِ وَلْيَسْتَعِذْ بِاللَّهِ مِنْهُ فَلَنْ يَضُرَّهُ  

I used to see (such horrible dreams) that I fell ill. I saw Abu Qatada who also said: I used to see dreams which made me sick until I heard Messenger of Allah ﷺ as saying: Good dreams are from Allah, so if any one of you sees which he likes he should not disclose it to one but whom he loves, but if he sees something which he does not like he should spit on his left side thrice and seek refuge with Allah from the mischief of the Satan and its mischief (i.e. of the dream), and he should not relate it to anyone, then it would not harm him.  

وَأَنَا كُنْتُ لأَرَى الرُّؤْيَا فَتُمْرِضُنِي حَتَّى سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الرُّؤْيَا الصَّالِحَةُ مِنَ اللَّهِ فَإِذَا رَأَى أَحَدُكُمْ مَا يُحِبُّ فَلاَ يُحَدِّثُ بِهَا إِلاَّ مَنْ يُحِبُّ وَإِنْ رَأَى مَا يَكْرَهُ فَلْيَتْفِلْ عَنْ يَسَارِهِ ثَلاَثًا وَلْيَتَعَوَّذْ بِاللَّهِ مِنْ شَرِّ الشَّيْطَانِ وَشَرِّهَا وَلاَ يُحَدِّثْ بِهَا أَحَدًا فَإِنَّهَا لَنْ تَضُرَّهُ  

I used to see dreams (and was so much perturbed) that I began to quiver and have temperature, but did not cover myself with a mantle. I met Abu Qatada and made a mention of that to him. He said: I heard Messenger of Allah ﷺ as saying: A good vision comes from Allah and a (bad) dream (hulm) from devil. So when one of you sees a bad dream (hulm) which he does not like, he should spit on his left side thrice and seek refuge with Allah from its evil; then it will not harm him.  

كُنْتُ أَرَى الرُّؤْيَا أُعْرَى مِنْهَا غَيْرَ أَنِّي لاَ أُزَمَّلُ حَتَّى لَقِيتُ أَبَا قَتَادَةَ فَذَكَرْتُ ذَلِكَ لَهُ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الرُّؤْيَا مِنَ اللَّهِ وَالْحُلْمُ مِنَ الشَّيْطَانِ فَإِذَا حَلَمَ أَحَدُكُمْ حُلْمًا يَكْرَهُهُ فَلْيَنْفُثْ عَنْ يَسَارِهِ ثَلاَثًا وَلْيَتَعَوَّذْ بِاللَّهِ مِنْ شَرِّهَا فَإِنَّهَا لَنْ تَضُرَّهُ  

A good vision is from Allah and a bad dream (hulm) is from the satan; so if one of you sees anything (in a dream) which he dislikes, he should spit on his left side thrice and seek refuge with Allah from its evil, and then it will never harm him. Abu Salama said: I used to see dreams weighing more heavily upon me than a mountain; but since I heard this hadith I don't care for it (its burden).  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الرُّؤْيَا مِنَ اللَّهِ وَالْحُلْمُ مِنَ الشَّيْطَانِ فَإِذَا رَأَى أَحَدُكُمْ شَيْئًا يَكْرَهُهُ فَلْيَنْفِثْ عَنْ يَسَارِهِ ثَلاَثَ مَرَّاتٍ وَلْيَتَعَوَّذْ بِاللَّهِ مِنْ شَرِّهَا فَإِنَّهَا لَنْ تَضُرَّهُ فَقَالَ إِنْ كُنْتُ لأَرَى الرُّؤْيَا أَثْقَلَ عَلَىَّ مِنْ جَبَلٍ فَمَا هُوَ إِلاَّ أَنْ سَمِعْتُ بِهَذَا الْحَدِيثِ فَمَا أُبَالِيهَا  

Yahya related to me from Malik from Yahya ibn Said that Abu Salama ibn Abd ar-Rahman said, "I heard Abu Qatada ibn Ribiyy say that he heard the Messenger of Allah ﷺ say, 'The good dream is from Allah, and the bad dream is from shaytan. When you see what you dislike, spit to your left side three times when you wake up, and seek refuge with Allah from its evil. It will not harm you then, Allah willing.' " Abu Salama said, "I would see dreams which weighed on me more heavily than a mountain. When I heard this hadith, I was not concerned about it."  

يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الرُّؤْيَا الصَّالِحَةُ مِنَ اللَّهِ وَالْحُلْمُ مِنَ الشَّيْطَانِ فَإِذَا رَأَى أَحَدُكُمُ الشَّىْءَ يَكْرَهُهُ فَلْيَنْفُثْ عَنْ يَسَارِهِ ثَلاَثَ مَرَّاتٍ إِذَا اسْتَيْقَظَ وَلْيَتَعَوَّذْ بِاللَّهِ مِنْ شَرِّهَا فَإِنَّهَا لَنْ تَضُرَّهُ إِنْ شَاءَ اللَّهُ قَالَ أَبُو سَلَمَةَ إِنْ كُنْتُ لأَرَى الرُّؤْيَا هِيَ أَثْقَلُ عَلَىَّ مِنَ الْجَبَلِ فَلَمَّا سَمِعْتُ هَذَا الْحَدِيثَ فَمَا كُنْتُ أُبَالِيهَا  

[Machine] The Messenger of Allah ﷺ said, "Righteous dreams are from Allah, and nightmares are from Satan. So, if anyone of you has a nightmare that he fears, then let him spit to his left and seek refuge in Allah from Satan, as it will not harm him." Yahya said, "Abu Salama informed me and said, 'I used to have a dream that I feared until it would make me lie down. So, I met Abu Qatadah and he informed me of this.'"  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «الرُّؤْيَا الصَّالِحَةُ مِنَ اللهِ وَالْحُلُمُ مِنَ الشَّيْطَانِ فَإِذَا حَلَمَ أَحَدُكُمْ حُلُمًا يَخَافُهُ فَلْيَبْصُقْ عَنْ يَسَارِهِ وَلْيَتَعَوَّذْ بِاللهِ مِنَ الشَّيْطَانِ فَإِنَّهَا لَا تَضُرُّهُ» قَالَ يَحْيَى فَحَدَّثَنِي أَبُو سَلَمَةَ قَالَ إِنْ كُنْتُ لَأَحْلُمُ الْحُلُمَ أَخَافُهُ حَتَّى يُضْجِعَنِي فَلَقِيتُ أَبَا قَتَادَةَ فَحَدَّثَنِي بِهَذَا  

"الرُّؤيَا الصَّالحِةُ مِنَ الله ﷻ فَإِذَا رَأى أَحَدُكُمْ مَا يُحِبُّ فَلَا يُحَدِّثْ بهَا إلا مَنْ يُحِبُّ، وَإِذَا رأى مَا يَكْرَهُ فَليتْفُل عَنْ يَسَاره ثَلاثًا، وَلْيَتَعَوَّذ باللهِ مِن شَرِّ الشَّيطَان الرَّجيم، وشرِّها، ولا يُحَدِّثْ بها أَحدًا، فإِنها لا تَضُرُّه".  

"الرُّؤيَا الصَّالِحَةُ مِنَ الله، وَالحُلْمُ مِنْ الشَّيطَان. فَإِذَا رَأى أَحَدُكُمْ شَيئًا يَكْرَهه فَليَنْفُثْ حِينَ يَسْتَيقِظ عَنْ يَسَارِه ثَلَاثًا وليتعَوَّذ بالله مِنْ شَرِّهَا فَإِنَّها لَا تَضُرُّه".