Does the Hadith: "The first thing a servant will be judged on is the prayer; if it is sound, then all his other deeds will be sound, and if it is corrupt, then all his other deeds will be corrupt" mean that a person who abandons prayer out of laziness will have none of his good deeds accepted, and will the supplication for forgiveness (istighfar) and charity (sadaqat) from his family benefit him, or does abandoning prayer invalidate all his deeds?

The aforementioned Hadith is authentic and well-established. The wording from Al-Tirmidhi is: "Indeed, the first thing a servant will be held accountable for on the Day of Resurrection, regarding his deeds, is his prayer. If it is sound, he will have succeeded and prospered. But if it is corrupt, he will have failed and lost. If there is any deficiency in his obligatory prayers, the Lord, the Mighty and Exalted, will say: 'Look, does My servant have any voluntary prayers with which to complete what was deficient in his obligatory prayers?' Then the rest of his deeds will be dealt with in the same manner." This Hadith may indicate that no righteous deed from one who abandons prayer will be accepted, and that whoever's prayer is accepted, all his other deeds are accepted, and whoever's prayer is rejected, all his other deeds are rejected. However, this does not necessarily mean that one who abandons prayer is a disbeliever, because whoever's deeds are nullified but has an atom's weight of faith in his heart will exit the Fire by Allah's permission. Seeking forgiveness for one who abandons prayer and giving charity on their behalf is based on the jurists' disagreement regarding their ruling. Those who consider them a disbeliever do not permit seeking forgiveness for them or giving charity on their behalf, while those who consider them disobedient permit it.