مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3948
Musnad of Abdullah bin Mas'ood
It was narrated that 'Abdullah said: I asked the Messenger of Allah (ﷺ): Which deed is best? He said: "Prayer offered on time, honouring one's parents and jihad for the sake of Allah." And if I had asked for more, he would have given me more.
Musnad Ahmad 3973Its isnad is saheeh, al-Bukhari (527) and Muslim (85)]