Believers praying together for many days

Scripture reference

Acts 1:14 (ASV 1901)

14These all with one accord continued stedfastly in prayer, with the women, and Mary the mother of Jesus, and with his brethren.

Stories

In 1886, a small group of believers from the China Inland Mission were gathered together to seek the face of God and for eight days, they offered prayers and fasted. And the Lord honoured His people as their petitions were granted.
Inspired by the story of the revival at Kassia Hills, India, missionaries from different denominations gathered together to pray for the same move of the Spirit to happen in Ping Yang. And for four months they continued to pray to God after which a first but most important result became obvious - they were United in Christ.