[21].Al-Anbiya [The Prophets]: Ayat 89-90

Ayat 89. And (remember) Zakariya PBUH (Zachariah), when he cried to his Lord: "O My Lord! Leave me not single (childless), though You are the Best of the inheritors."

Ayat 90. So Allah answered his call, and bestowed upon him Yahya PBUH(John), and cured his wife (to bear a child) for him. Verily, they used to hasten on to do good deeds, and they used to call on Allah with hope and fear, and used to humble themselves before Allah.

[Tafseer] Zakariya was a priest; both he and his wife were devout and punctilious in their duties. They were old, and they had no son. He was troubled in mind, not so much by the vulgar desire to have a son to carry on his line, but because he felt that his people were not unselfishly devout, and there would be no sincere work for Allah unless he could train some one himself. He was given a son Yahya (John the Baptist), who added to the devout reputation of the family, for he is called "noble, chaste, and a prophet," (3:39). All three, father, mother, and son, were made worthy of each other, and they repelled evil by their devout emulation in virtue, It is not that I crave a personal heir to myself; all things go back to Thee, and Thou art the best of inheritors: but I see no one around me sincere enough to carry on my work for Thee; wilt Thou give me one whom 1 can train?' Aslaha = to improve, to mend, to reform, to make better. Here, with reference to Zakanya's wife the signification is twofold: (1) that her barrenness would be removed, so that she could become a mother; and (2) her spiritual dignity should be raised in becoming the mother of John the Baptist; and by implication his also, in becoming the father of John. 

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, "No one who weeps out of Fear of Allah will enter Hell until milk recedes to the udder, and the dust endured while striving in the Cause of Allah and the smoke of Hell will never subsist together.''

[At-Tirmidhi # 1633].  

Lesson : as mentioned above in Surah Al-Anbiya Ayat 90."call on Allah with hope and fear, and used to humble themselves before Allah" This Hadith makes use of a metaphor to stress the impossible. One who weeps for Fear of Allah and one who is covered with the dust of the battlefield in the course of Jihad, will in no case enter Hell until the milk drawn from udder goes back to it. The dust of the battlefield of Jihad and the smoke of Hell cannot combine at one place. The mixing of the two is utterly impossible. However, this will apply only if one's `Aqeedah is correct and one's intention is correct (i.e., one participates in Jihad with the intention to please Allah Alone).