Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī

ذِكْرُ اسْتِحْبَابِ الْإِكْثَارِ فِي السُّؤَالِ رَبَّهُ جَلَّ وَعَلَا فِي دُعَائِهِ، وَتَرْكِ الِاقْتِصَارِ عَلَى الْقَلِيلِ مِنْهُ

ibnhibban:889 – al-Ḥasan b. Sufyān > Maḥmūd b. Ghaylān > Abū Aḥmad al-Zubayrī > Sufyān > Hishām b. ʿUrwah from his father > ʿĀʾishah

[Machine] The Messenger of Allah ﷺ said, "When one of you asks, let him ask abundantly, for indeed he is asking his Lord."  

ابن حبّان:٨٨٩ – أَخْبَرَنَا الْحَسَنُ بْنُ سُفْيَانَ قَالَ حَدَّثَنَا مَحْمُودُ بْنُ غَيْلَانَ قَالَ حَدَّثَنَا أَبُو أَحْمَدَ الزُّبَيْرِيُّ قَالَ حَدَّثَنَا سُفْيَانُ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَتْ

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا سَأَلَ أَحَدُكُمْ فَلْيُكْثِرْ فَإِنَّهُ يَسْأَلُ رَبَّهُ»  

See similar narrations below:

Collected by Aḥmad, Suyūṭī
ahmad:14128 – ʿAbd al-Razzāq > Ibn Jurayj > Abū al-Zubayr > Jābir b. ʿAbdullāh

When anyone wipes himself with pebbles (after answering the call of nature) he should do this odd number of times. (Using translation from Muslim 239)  

أحمد:١٤١٢٨ – حَدَّثَنَا عَبْدُ الرَّزَّاقِ حَدَّثَنَا ابْنِ جُرَيْجٍ أَخْبَرَنِي أَبُو الزُّبَيْرِ أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللهِ يَقُولُ

قَالَ رَسُولُ اللهِ ﷺ إِذَا اسْتَجْمَرَ أَحَدُكُمْ فَلْيُوتِرْ