Verses with the word endeavoured in the New Testament (2 verses):

Acts 16:10
And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them.

1 Thessalonians 2:17
But we, brethren, being taken from you for a short time in presence, not in heart, endeavoured the more abundantly to see your face with great desire.