Sloka 171: If Ekadashi exists for just 2 ghatikas before sunrise, it is considered as Sankeerna Ekadashi. Those desirous of Dharma and Artha should not fast on such Ekadashis
Sloka 172: Having fasted on an Ekadashi which had Dashami at the beginning, Gandhari lost all her 100 sons. Therefore, Viddhi Ekadashi must be avoided
Sloka 173: The learned say that Ekadashi with even a small element of Dashami must be avoided just like Amruta which is contaminated with alcohol is avoided
Sloka 174: Many shastras offer contrasting rules about Ekadashi. If brahmins are discussing about when to fast, it is always better (safer) to fast on Dwadashi and perform Parana on Trayodashi
Sloka 175: If Ekadashi has the Vedha of Dashami, even if the nakshatra during Dwadashi is Shravana, it is correct to fast on Dwadashi, both during Shukla and Krishna pakshas
Sloka 176: Thousands of eclipses, ten thousand Vyatipatas, lakhs of Amavasyas; all these are not equal to even one sixteenth of a Dwadashi
Sloka 177: Even if there is a bit of Dwadashi on a Trayodashi, it is just as fit for fasting like a pure Dwadashi (full day of Dwadashi). Dashami is like poison while Ekadashi is like Amruta. Therefore, Ekadashi which is contact with poison-like Dashami must be avoided and Ekadashi, which is nectar-like, must always be accepted for fasting
Sloka 178: Those who fast on a Viddhi Ekadashi and perform Parana on the next day (Dwadashi) are fools and attain hell!
Sloka 179: Those shastras which propagate fasting on a Viddhi Ekadashi are oriented towards material gains such as wealth. Ekadashi which has the Vedha of Dashami is never pleasing to Lord Hari
Sloka 180: On the other hand, upon the prayer of Mohini, wife of King Rukmanga, Lord Janardana, in the form of Veda Vyasa wrote those statements in the Puranas which propagate fasting on a Viddhi Ekadashi, just in order to confuse the evil!
Anandatirtha Prathishtana 