Musannaf Ibn Abi Shayba 3:5135

Waki’ narrated to us, from Rabi’ah ibn ‘Uthman al-Taymi, he said: Idris al-San’ani narrated to us, from a man who was called Hamdan, and he was the courier of the people of Yemen to Umar. He said: Umar said, "Those who are praying are more entitled to the pillars than those who are talking by them."