عَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ صَلَّى عَلَيَّ صَلَاةً وَاحِدَةً صَلَّى اللَّهُ عَلَيْهِ عَشْرَ صَلَوَاتٍ وَحُطَّتْ عَنْهُ عَشْرُ خَطِيئَاتٍ وَرُفِعَتْ لَهُ عَشْرُ دَرَجَاتٍ» . رَوَاهُ النَّسَائِيّ
Translation
‘Abdallah b. Mas'ud said

I was praying, and so was the Prophet accompanied by Abu Bakr and ‘Umar. When I sat I first extolled God’s praises then invoked blessings on the Prophet, then made supplication for myself, and the Prophet said, “If you ask you will be given it, if you ask you will be given it.” Tirmidhi transmitted it.