Anas reported that the Messenger of Allah ﷺ observed Qunut for one month invoking curse upon some tribes of Arabia (those who were responsible for the murders in Bi'r Ma'una and Raji'), but then abandoned it.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَنَتَ شَهْرًا يَدْعُو عَلَى أَحْيَاءٍ مِنْ أَحْيَاءِ الْعَرَبِ ثُمَّ تَرَكَهُ  

The Messenger of Allah ﷺ said the Qunut for one month, supplicating against one of the 'Arab tribes, then he stopped doing that."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَنَتَ شَهْرًا يَدْعُو عَلَى حَىٍّ مِنْ أَحْيَاءِ الْعَرَبِ ثُمَّ تَرَكَهُ  

The Prophet ﷺ recited the supplication for a month (in prayer) and then gave it up.  

أَنَّ النَّبِيَّ ﷺ قَنَتَ شَهْرًا ثُمَّ تَرَكَهُ  

[Machine] "That the Prophet ﷺ stayed in prostration for a while after the bowing."  

أَنَّ النَّبِيَّ ﷺ قَنَتَ شَهْرًا بَعْدَ الرُّكُوعِ  

The Prophet ﷺ recited the supplication for a month (in prayer) and then gave it up. (Using translation from Abū Dāʾūd 1445)  

أَنَّ النَّبِيَّ ﷺ قَنَتَ شَهْرًا ثُمَّ تَرَكَهُ  

[Machine] That the Prophet ﷺ prolonged his prostration after bowing for a month.  

أَنَّ النَّبِيَّ ﷺ قَنَتَ شَهْرًا بَعْدَ الرُّكُوعِ  

The Prophet ﷺ recited the supplication for a month (in prayer) and then gave it up. (Using translation from Abū Dāʾūd 1445)  

أَنَّ النَّبِيَّ ﷺ قَنَتَ شَهْرًا ثُمَّ تَرَكَهُ