"While they were worshiping the Lord and fasting, the Holy Spirit said, 'Set apart for me Barnabas and Saul for the work to which I have called them.' So after they had fasted and prayed, they placed their hands on them and sent them off."
— Acts 13:2-3
Quick Answer
Fasting paired with prayer intensifies focus and humility before God when seeking his direction, as seen when the church at Antioch fasted and prayed before sending out Paul and Barnabas (Acts 13:2-3). It is not a technique to manipulate God's answer but a way of setting aside physical comfort to seek him with undivided attention (Joel 2:12).
Two Disciplines, One Purpose
Fasting is voluntarily going without food, or sometimes other comforts, for a set time in order to focus more fully on seeking God. On its own, fasting is not a spiritual practice with independent value; Scripture consistently pairs it with prayer, since the point was never the empty stomach but the attention that emptiness helps create. Throughout the Bible, believers fast specifically so that the hunger reminds them, meal after skipped meal, to keep turning back to God rather than to food, distraction, or self-reliance.
This is why fasting and prayer appear together so often in Scripture when God's people face major decisions, crises, or the need for clear direction — the fast intensifies the prayer rather than replacing it. There is nothing in Scripture suggesting a required length or type of fast; what matters is the posture of humility and dependence the fast is meant to cultivate, not the specific number of hours or meals skipped.
A Clear Example: Choosing Paul and Barnabas
One of the clearest pictures of fasting and prayer together in seeking God's direction comes from the church at Antioch. Luke records, "While they were worshiping the Lord and fasting, the Holy Spirit said, 'Set apart for me Barnabas and Saul for the work to which I have called them.' So after they had fasted and prayed, they placed their hands on them and sent them off" (Acts 13:2-3). This was not a spontaneous, thoughtless decision; it was the outcome of a deliberate season of fasting and prayer that made the church unusually attentive to the Spirit's direction.
The same pattern shows up again just afterward, when Paul and Barnabas appointed elders in the churches they planted "with prayer and fasting" (Acts 14:23), committing those new leaders to the Lord through the same combined discipline.
Old Testament Roots of the Practice
This pairing did not begin in the New Testament. Before leading a dangerous journey back to Jerusalem with valuable treasure and no armed escort, Ezra writes, "I proclaimed a fast, so that we might humble ourselves before our God and ask him for a safe journey for us and our children, with all our possessions" (Ezra 8:21). He explicitly connects the fasting to humility before God rather than to any belief that abstaining from food itself compelled a particular outcome. Daniel similarly turned to prayer, fasting, and mourning when seeking to understand God's plans for his exiled people (Daniel 9:3).
The prophet Joel calls the nation to exactly this combination in a time of crisis: "Even now, return to me with all your heart, with fasting and weeping and mourning... Rend your heart and not your garments" (Joel 2:12-13) — fasting as an outward expression of genuine, humbled seeking, not a substitute for it.
What Fasting Does Not Do
It is important to be clear that fasting does not obligate God to answer more quickly, more specifically, or more favorably, as though physical discomfort earns spiritual leverage. Jesus assumed his followers would fast, but he warned sharply against turning it into a performance: "when you fast, do not look somber as the hypocrites do... but when you fast, put oil on your head and wash your face" (Matthew 6:16-17), keeping the practice private and sincere rather than a display meant to impress others or pressure God.
Fasting is a tool for the one fasting — sharpening focus, humbling pride, and clearing away the noise of daily comfort so that seeking God's direction can happen with fewer distractions, not a lever for controlling God's response. Anyone considering an extended fast should also use ordinary wisdom about health, medication, and physical limitations; Scripture nowhere treats a longer or harder fast as automatically more spiritual than a shorter one offered with a sincere heart.
Practicing This When Seeking Direction
If you are facing a major decision and want to seek God's direction with the kind of intensity Scripture models, consider setting apart a specific time to fast — skipping a meal, a day, or longer, depending on your health and season of life — paired deliberately with focused prayer during that same time rather than simply going hungry. Use the discomfort as a repeated prompt to pray again. Come to it expecting not a formula that guarantees a specific answer, but a posture of humility and attentiveness in which God's direction, however he chooses to give it, is more likely to be heard clearly.