I will pray with the spirit, and I will pray with the understanding also; I will sing with the spirit, and I will sing with the understanding also (I Cor. xiv:15).
Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication (Eph. vi:18).
Night and day praying exceedingly that we might see your face, and might perfect that which is lacking in your faith (I Thes. iii:10).
And hearken thou to the supplication of thy servant, and of thy people Israel, when they shall pray toward this place: and hear thou in heaven thy dwelling place: and when thou hearest, forgive (I Kings viii:30).
Nevertheless, we made our prayer unto our God, and set a watch against them day and night, because of them (Neh. iv:9).
Thou shalt make thy prayer unto him, and he shall hear thee, and thou shalt pay thy vows (Job xxii:27).
He will regard the prayer of the destitute, and not despise their prayer (Psalm cii:17).
The sacrifice of the wicked is an abomination to the Lord; but the prayer of the upright is his delight (Prov. xv:8).
And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes.... (Dan. ix:3).
... and nothing shall be impossible unto you. Howbeit this kind goeth not out but by prayer and fasting (Matt. xvii:21).