In the chandas (Vedas) the substitute of hi is optionally treated as not having an indicatory p,
The result is that in the Chhandas the second person singular of लोट् has two forms as प्रीणाहि or प्रीणीहि; युयुधि or युयोधि, धि being substituted for हि in the Vedas, by rule 6.4.103 as in the following verse:
अग्ने॒॒ नय॑ सु॒॒पथा॑रा॒॒येऽअ॒॒स्मान्विश्वा॑निदेव व॒॒यूना॑निविद्वा॒॒न् ।
यु योध्य॒॒स्मज्जु॑हुरा॒॒णमेनो॒॒भूयि॑ष्ठान्ते॒॒ नमाऽउक्तिम्विधेम ॥
--Rig 1. 189. 1: Yajur Veda. 40. 16.,