The Compendium of Kāśyapa 8.3.43

8.3.43

sa vayobalasaṃpanne guruvyādhau ca śasyate
saptadhaivaṃ vibhajyaitaddaśadhā pravicārayet
pūrvaṃ bhaktasya madhye'dhaḥ samudgaṃ samuhurmuhuḥ

it is recommended for one endowed with age and strength and in a severe disease. / Having divided it thus into seven, one should consider it in ten ways: / before a meal, in the middle of it, below it, between two meals, repeatedly,