Tulasi

http://tulsiplant.blogspot.com/

1. Whosoever worships Lord Shri Hari with Tulasi leaves is freed from all implication of sin. Indeed, he lives untouched by sin, as the lotus leaf, although in the water, is untouched by it. 
2. Whosoever offers Lord Shri Hari but a single leaf from the sacred Tulasi tree (occillium basilcum sanctum) attains as much merit as one who gives away in charity two hundred grams of gold and eight hundred grams of silver. 
3. The Supreme Personality of Godhead is more pleased by one who offers Him a single Tulasi leaf than by one who worships Him with pearls, rubies, topaz, diamonds, lapis lazuli, sapphires, gomedA stones (gomaz), cat’s eye gems, and coral. 
4. One who offers Lord Keshava newly grown maNjari buds from the Tulasi plant gets rid of all the sins he has committed during this or any other lifetime. Indeed, mere darshana of Tulasi on KAmikA EkAdasii removes all sins, and merely touching her and praying to her removes all kinds of disease. 
5. One who waters Tulasi devi need never fear the Lord of death, YamarAja. One who plants or transplants Tulasi on this days will eventually reside with Lord Shri Krishna in His own abode. 
6. To Srimati Tulasi devi, who awards liberation in devotional service, one should therefore daily offer one’s full obeisances.
7. Even Chitragupta, YamarAja’s secretary, cannot calculate the merit obtained by one who offers Shrimati Tulasi-devi a perpetually burning ghee lamp.

Source

ShrAvaNa-kRshNa EkAdasii, or KAmikA EkAdasii,from the Brahma-Vaivarta PurANa.

https://www.youtube.com/results?search_query=Kamika+Ekadashi