R' David ibn Zimra (Radbaz)

Is it better to say many supplications without concentration or few with concentration?

One who says many prayers with proper intention and one who says few with proper intention are both …

Is the Ashkenazi custom of reciting piyutim to be maintained even given the Mechaber's prohibition?

The custom to recite piyutim should be maintained and the established minhag should not be changed.

May the congregation recite 'Nakdishakh' together with the prayer leader during the preparatory section of Kedusha?

One should not recite with the chazan word by word 'Nakdishakh ve'Na'aritzakh'. Instead, one should …

Should one raise one's eyes upward during the recitation of Kedusha?

The eyes should be raised on high, but they should be closed (not open). This is understood from the…

Must one inspect a tallit for valid tzitzit before wearing it on Shabbat in the public domain?

One need not check the tallit before going out, relying on chazakah that it is properly fitted. Howe…

If one discovers on Shabbat that tzitzit are invalid, was one liable for a sin offering if one already went out before the discovery?

If all four tzitzit are severed and no strings remain (meaning new ones would be made), they are nul…

Why are Monday and Thursday observed as special days for increasing supplications?

Monday and Thursday are days of favor because of the forty days when the second tablets were receive…

May one recite the word 'תתברך' (tatbrokh - 'you shall be blessed') in the fourth blessing of Birkat HaMazon?

Do not recite 'tatbrokh' because 'Blessed are You' (Barukh Atah) was already stated

What is the proper nusach (text) for 'HaMelekh HaTov' in the fourth blessing, regarding the inclusion of the word 'El' before 'every day'?

The phrase 'El she'bechol yom' appears in some printed editions but has no clear explanation. Some s…

What is the status of the fourth blessing 'Baruch HaTov VeHaMativ' – is it biblical (D'Oraita) or rabbinic (D'Rabbanan)?

The fourth blessing is D'Rabbanan (rabbinic), instituted for the victims of Betar after their bodies…

Should the fourth blessing open with 'Baruch' (Blessed)?

The fourth blessing opens with 'Baruch' specifically because it is not Smukha (directly adjacent) to…

Should the fourth blessing close (end) with the word 'Baruch'?

The blessing does not close with 'Baruch'. Originally it was only 'Baruch HaTov VeHaMativ' (the shor…

How many 'Malkiyot' (kingdoms/royalties) are mentioned in the fourth blessing?

Three kingdoms are included: one is inherent to all blessings ('Melekh HaOlam'), one is added becaus…

How many 'Tuvot' (benefits) and 'Gemulot' (rewards/acts of kindness) are mentioned in the fourth blessing, and what are they?

The blessing includes three benefits and three rewards reflecting past, present, and future tenses

Does seeing the Nile at flood stage trigger a blessing, and which one?

One who sees the Nile when it is low and then returns to see it when it is full and high recites 'sh…