Physical capability denotes that one has the ability to reach the Sacred House in Makkah on his own without difficulty. If he cannot do that, or can do it but with extreme difficulty, such as the case of the sick person, he may wait until his conditions improve, if the improvement is possible. If he waits but dies before making Hajj, Hajj is to be made on his behalf, with the expenses taken from his legacy. If his conditions are not likely to improve, such as the case of senility or chronic incurable diseases, he should authorize another person to make Hajj on his behalf, either from his relatives or others. If he dies before assigning a person to make Hajj on his behalf, any person may make Hajj for him, with the expenses covered from the former’s legacy. If a woman finds no Mahram  (husband or male relative whom she cannot marry) to accompany her on the journey, she will not be obliged to perform Hajj. In this case she will be regarded as those who do not have the ability to perform Hajj, since she is legally banned from travel on a journey without a Mahram. Ibn ‘Abbas may Allaah be pleased with him, said: I heard the Messenger sallallaahu ‘alayhi wa sallam saying: “It is not permissible for a man to be alone with a woman, and no lady should travel except with a Mahram  (i.e. her husband or a person whom she cannot marry in any case forever; e.g. her father, brother, etc.)." Then a man got up and said, "O Allah Messenger of Allah! I have enlisted in the army for such-and-such Ghazwah and my wife is proceeding for Hajj." Allah's Apostle said, "Go, and perform the Hajj with your wife.” 

In this narration, the Prophet sallallaahu ‘alayhi wa sallam ordered the man to accompany his wife in the journey of Hajj, without asking him whether she was young or that she would join a group of women in the journey. This formulates a proof that a woman is prohibited to travel without a Mahram on any occasion or by any means of transports, i.e. planes, cars, etc. A Mahram should be a mature male, as an immature person cannot serve the purpose of this condition, which is to preserve woman’s honor and chastity.

Let those who fulfill the conditions of Hajj perform it without delay before he is overtaken by death and then regret when it will be too late for regret. Allah the Almighty says which translates as: “"Turn ye to your Lord (in repentance) and bow to His (Will), before the Penalty comes on you: after that ye shall not be helped."And follow the Best of (the courses) revealed to you from your Lord, before the Penalty comes on you - of a sudden while ye perceive not! - "Lest the soul should (then) say: `Ah! Woe is me! In that I neglected (my Duty) towards Allah, and was but among those who mocked!' "Or (lest) it should say: 'If only Allah had guided me, I should certainly have been among the righteous!' "Or (lest) it should say when it (actually) sees the Penalty: 'If only I had another chance, I should certainly be among those who do good!'” (Az-Zumar: 54 – 58)

Whoever performs Hajj, abiding by the legal rules, with sincere devotion to Allah and with adherence to the conduct of the Messenger of Allah, his Hajj will be perfect, no matter whether that Aqiqah was slaughtered by his parents on the seventh day of his birth or not.

Hajj is one of the best kinds of worship and the greatest in reward. It was related that the Prophet sallallaahu ‘alayhi wa sallam said: “(The performance of) ‘Umrah is an expiation for the sins committed (between it and the previous one). And the reward of Hajj Mabroor (the one accepted by Allah) is nothing except Paradise. Whoever performs Hajj to this House (Ka’bah) and does not approach his wife for sexual relations nor commits sins (while performing Hajj), he will come out as sinless as a newly born child. (Just delivered by his mother)”.