Pray without ceasing. – 1 Thessalonians 5:17

While your hands are busy with the world, let your hearts still talk with God; not in twenty sentences at a time, for such an interval might be inconsistent with your calling, but in broken sentences and interjections. It is always wrong to present one duty to God stained with the blood of another, and that we should do if we spoiled study or labor by running away to pray at all hours; but we may, without this, let short sentences go up to heaven, ay, and we may shoot upwards cries, and single words, such as an “Ah,” an “Oh,” an “O that;” or, without words we may pray in the upward glancing of the eye or the sigh of the heart. He who prays without ceasing uses many little darts and hand-grenades of godly desire, which he casts forth at every available interval. Sometimes he will blow the furnace of his desires to a great heat in regular prayer, and as a consequence at other times, the sparks will continue to rise up to heaven in the form of brief words, and looks, and desires.

We must be always in the spirit of prayer. Our heart, renewed by the Holy Ghost, must be like the magnetized needle, which always has an inclination towards the pole. It does not always point to that pole, you can turn it aside if you will; in an iron ship it exhibits serious deflections, under all circumstances it is not exactly true; but if you put your finger to that needle and force it round to the east, you have only to take away the pressure, and immediately it returns to its beloved pole again. So let your heart be magnetized with prayer, so that if the finger of duty turns it away from the immediate act of prayer, there may still be the longing desire for prayer in your soul, and the moment you can do so, your heart reverts to its beloved work. As perfume lies in flowers even when they do not shed their fragrance upon the gale, so let prayer lie in your hearts. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1039.cfm