Nadhr refers to a "Vow" made to Allah. For example, a person might say, "If I recover from this illness, I will fast for three days for the sake of Allah." Once a Nadhr is made for a permissible or good act, it becomes "Wajib" (obligatory) to fulfil it. However, the Prophet (PBUH) discouraged making vows as a way to "bargain" with Allah, stating that a vow does not change destiny but only extracts something from the stingy. If a vow is made, it must be fulfilled out of sincerity and honour. A nadhr (vow) is a commitment to perform an act of worship beyond what is already obligatory. It becomes binding upon the one who makes it, as the Quran states: "And let them fulfill their vows" (22:29). Vows can be conditional ("If Allah heals my son, I will fast three days") or absolute ("I vow to pray two rak'at daily"). Conditional vows become binding only if the condition is met. The Prophet strongly discouraged making vows, saying: "Do not make vows, for a vow does not bring about anything from Allah; it only causes the miserly to spend" (Bukhari, Muslim). The meaning is that vows do not change divine decree (qadr); they only compel someone who is reluctant to give. If one makes a vow to do something good, they must fulfill it. If one vows to do something sinful or impossible, they must not fulfill it; instead, they should make expiation (kaffarah) for a broken oath. The best attitude is to avoid making vows and instead rely directly on Allah's mercy. However, if a vow is made, fulfilling it becomes obligatory. The permissibility of vows has been debated among scholars; some consider them disliked (makruh), while others permit them if the intention is to encourage oneself to do good. The nadhr system provides a mechanism for those who wish to commit themselves to extra worship, but the prophetic teaching encourages believers to simply perform good deeds without making vows. The ultimate lesson is that worship should flow from love and gratitude, not from bargaining with Allah. A believer trusts that Allah provides without requiring such commitments.