Later in 1617, Pierre de Bérulle asked Vincent to accept the parish in Châtillon because the negligence and scandalous lives of the local clergy were paving the way for conversions to Protestantism. Seeing the poverty of the local people, Vincent formed the first group of Ladies of Charity. Many other groups followed. Throughout his life Vincent accompanied these groups as their principal formator, writing rules for them and addressing them individually or communally on numerous occasions.