in verse 17.20, as one given without expectation of return, at the proper time and place, and to a worthy person. It defines rajas (passion, ego driven, active) charity, in verse 17.21, as one given with the expectation of some return, or with a desire for fruits and results, or grudgingly. It defines tamas (ignorant, dark, destructive) charity, in verse 17.22, as one given with contempt, to unworthy person(s), at a wrong place and time. In Book 17, Bhadwad Gita suggests steadiness in sattvikam dāna, or the good form of charity is better; and that tamas should be avoided. These three psychological categories are referred to as the guṇas in Hindu philosophy. The Adi Parva of the Hindu Epic Mahabharata, in Chapter 91, states that a person must first acquire wealth by honest means, then embark on charity; be hospitable to those who come to him; never inflict pain on any living being; and share a portion with others whatever he consumes. In Chapter 87 of Adi Parva, it calls sweet speech and refusal to use harsh words or wrong others even if you have been wronged, as a form of charity. In the Vana Parva, Chapter 194, the Mahabharata recommends that one must, "conquer the mean by charity, the untruthful by truth, the wicked by forgiveness, and dishonesty by honesty". Anushasana Parva in Chapter 58, recommends public projects as a form of dāna. It discusses the building of drinking water tanks for people and cattle as a noble form of giving, as well as giving of lamps for lighting dark public spaces. In later sections of Chapter 58, it describes planting public orchards, with trees that give fruits to strangers and shade to travelers, as meritorious acts of benevolent charity. In Chapter 59 of Book 13 of the Mahabharata, Yudhishthira and Bhishma discuss the best and lasting gifts between people: The Bhagavata Purana discusses when dāna is proper and when it is improper. In Book 8, Chapter 19, verse 36 it states that charity is inappropriate if it endangers and cripples modest livelihood of one's biological dependents or of one’s own. Charity from surplus income above that required for modest living is recommended in the Puranas. Hindu texts exist in many Indian languages. For example, the Tirukkuṛaḷ, written between 200 BCE and 400 CE, is one of the most cherished classics on Hinduism written in a South Indian language.