Nasai

(1) "Uqiyyah" is equivalent to forty dirhams. Twelve and a half uqiyyahs amount to five hundred dirhams.

(2) "Contracted marriage" means that he himself married his noble wives, and arranged the marriages of his daughters to his sons-in-law. If most of the marriages were contracted on this dowry, then the above-mentioned words can be used, even if not all marriages were on this dowry. This was a reasonable dowry. According to our current currency, it amounts to approximately ten thousand rupees, even though that was a time of hardship. As for the notion nowadays that thirty-two and a quarter rupees is considered the Shari' (legal) dowry—what era's calculation is this? Allah knows best! This is extremely unreasonable, let alone being Shari' (legal).

Hadith Commentary: Benefits and Issues: (1)
From the hadith of Ali radi Allahu anhu, the Prophet’s sallallahu alayhi wa sallam deep attachment and longing for prayer is evident, such that he sallallahu alayhi wa sallam was so grieved and distressed at having to delay it that he supplicated against the polytheists who were the cause of this. Yet, when he sallallahu alayhi wa sallam was wounded while proclaiming the message of tawhid in the valleys of Ta’if, when hurtful words were spoken to him, and when ruffians and scoundrels jeered at him, he sallallahu alayhi wa sallam did not supplicate against them. In this way, even when the polytheists committed all kinds of oppression and tyranny, he sallallahu alayhi wa sallam did not supplicate against them. But at the occasion of the Battle of the Trench (Ghazwah Khandaq), when the time for prayer passed, his sallallahu alayhi wa sallam patience reached its limit. But what is our condition today? We abandon prayers without reason or excuse, and we do not even feel it.

(2)
Until the Battle of the Trench (Ghazwah Khandaq), the ruling regarding the prayer of fear (salat al-khawf, the prayer during battle) had not yet been revealed, so the Prophet sallallahu alayhi wa sallam did not perform the prayer of battle. And from these ahadith, it is also established that the “middle prayer” (al-salat al-wusta) refers to the Asr prayer.

Benefits and Issues:
There are forty dirhams of silver in one uqiyyah, therefore this amount becomes five hundred dirhams. According to the current standard, the weight of one dirham is 2.975 grams, and according to previous scholars, it is 3.06 grams.

Benefits and Issues:

➊ In marriage, the bridal due (mahr) is obligatory. Allah the Exalted has said:
﴿وَأُحِلَّ لَكُم مَّا وَرَ‌اءَ ذَٰلِكُمْ أَن تَبْتَغُوا بِأَمْوَالِكُم مُّحْصِنِينَ غَيْرَ‌ مُسَافِحِينَ﴾ (: al-Nisa, 4:24)
“And besides those (aforementioned) women, all others are lawful for you, provided you seek them (in marriage) with your wealth (by giving the bridal due), desiring chastity, not lust.”

➋ In the aforementioned verse, the conditions of a valid (shar‘i) marriage are stated.

First, that you seek (marriage) ﴿أَن تَبْتَغُوا﴾, meaning there must be proposal and acceptance from both sides.

Second, that you give wealth ﴿بِأَمْوَالِكُم﴾, meaning the bridal due (mahr) must be paid.

Third, that the intention is to bring the woman into the permanent bond of marriage, not for temporary pleasure (mut‘ah) or for making something lawful (halalah) ﴿مُّحْصِنِينَ﴾ “those who confine (women) in a fortress (hisn).”

The fourth condition is that it should not be a secret relationship, but rather the marriage should take place in the presence of witnesses.
﴿وَلَا مُتَّخِذَاتِ اَخْدَان﴾ “nor those who take secret lovers.” (: al-Nisa, 4:25) (Summary of Tafsir Ahsan al-Bayan, Hafiz Salahuddin Yusuf)

➌ The bridal due (mahr) should not be set so high that it becomes difficult for the husband to pay, nor should it be set so low that it holds no significance in the eyes of the husband.

➍ If the husband is poor, the bridal due (mahr) may be set very low, even if it is only an iron ring. (Sahih al-Bukhari, Kitab al-Nikah, Hadith: 5150; and Sahih Muslim, Kitab al-Nikah, Hadith: 1425)

➎ The amount of five hundred dirhams is approximately equal to one and a half kilograms of silver.