Al-Hasan (may Allah have mercy on him) said: We were with Abd al-Rahman bin Samurah (may Allah be pleased with him) in Khurasan; we used to shorten the prayer and did not hold the Friday prayer.
This is how I found it in my book: "wa la nujammi'u" (and we did not hold the Friday prayer), with a doubled letter and the nun with dammah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5640