The prayers of the saints to our God are very precious in His sight. 

Revelation 5:8 KJV

And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints.

These prayers, supplications, intercessions, earnest requests, entreaties are so important to God that we are admonished to continue in this manner without stopping. 2 Timothy 1:3 KJV...

"I thank God, whom I serve from my forefathers with pure conscience, that without ceasing I have remembrance of thee in my prayers night and day"