Musannaf Ibn Abi Shaybah 35280 — Those who held they should not

Abu Hilal (may Allah have mercy on him) said that al-Hasan al-Basri (may Allah have mercy on him) was asked about the enemy: "Are they to be invited before fighting?" He (may Allah have mercy on him) said: "The invitation to Islam has already reached them, ever since Allah, the Lord of Glory, sent Muhammad (peace and blessings be upon him)."