Al-Kāfi - Volume 5 > Words to Say When Buying for Resale Purposes
Hadith #3

3- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ وَسَهْلِ بْنِ زِيَادٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ إِذَا أَرَدْتَ أَنْ تَشْتَرِيَ شَيْئاً فَقُلْ يَا حَيُّ يَا قَيُّومُ يَا دَائِمُ يَا رَءُوفُ يَا رَحِيمُ أَسْأَلُكَ بِعِزَّتِكَ وَقُدْرَتِكَ وَمَا أَحَاطَ بِهِ عِلْمُكَ أَنْ تَقْسِمَ لِي مِنَ التِّجَارَةِ الْيَوْمَ أَعْظَمَهَا رِزْقاً وَأَوْسَعَهَا فَضْلا وَخَيْرَهَا عَاقِبَةً فَإِنَّهُ لا خَيْرَ فِيمَا لا عَاقِبَةَ لَهُ قَالَ وَقَالَ أَبُو عَبْدِ اللهِ (عَلَيْهِ السَّلام) إِذَإ؛ اشْتَرَيْتَ دَابَّةً أَوْ رَأْساً فَقُلِ اللهُمَّ اقْدِرْ لِي أَطْوَلَهَا حَيَاةً وَأَكْثَرَهَا مَنْفَعَةً وَخَيْرَهَا عَاقِبَةً.

3. A number of our people have narrated from Ahmad ibn Muhammad from and Sahl ibn Ziyad from ibn Mahbub from Mu‘awiyah ibn ‘Ammar who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘When you decide to buy something say this, “O Living, O Guardian, O Eternal, O Compassionate, O Merciful I pray to You through Your majesty, Your power and all that Your knowledge encompasses, grant me of business the greatest share of sustenance, vastest extra favors and the best of consequences; there is no goodness in that which is void of good consequences.’” He (the narrator) has said that abu ‘Abd Allah, ‘Alayhi al-Salam, then said, ‘When you buy an animal or a head (living thing) say this, “O Allah, make it to live the longest, benefit the most and of the best consequences.’””