Mark 6:46 And when he had sent them away, he departed into a mountain to pray.
Luke 6:12 And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God.
Romans 8:26 Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.
1 Thessalonians 5:17 Pray without ceasing.
Philippians 4:6 Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.