Arabic hadith text
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَزِيدَ بْنِ رُومَانَ، أَنَّهُ قَالَ كُنْتُ أُصَلِّي إِلَى جَانِبِ نَافِعِ بْنِ جُبَيْرِ بْنِ مُطْعِمٍ فَيَغْمِزُنِي فَأَفْتَحُ عَلَيْهِ وَنَحْنُ نُصَلِّي ‏.‏
Translation

Yahya related to me from Malik that Yazid ibn Ruman said, "I usedto pray next to Nafi ibn Jubayr ibn Mutim and he would nudge me toprompt him while we were praying."